Kali Prasanna Nayak
| Department of Engineering Science | Associate Professor |
| Cluster III (Fundamental Science and Engineering) | Associate Professor |
Researcher Information
Research Activity Information
Paper
- Slot waveguide enhanced asymmetric photonic crystal nanofiber cavity for fiber-coupled single photons
Subrat Sahu; Kali P. Nayak; Kodanda R. Mangipudi; Rajan Jha
Applied Physics Letters, AIP Publishing, 124, 3, 034002, 15 Jan. 2024, Peer-reviwed, We report a slot waveguide-enhanced asymmetric photonic crystal optical nanofiber (ONF) cavity to realize cavity quantum electrodynamics. We show that the device can strongly enhance the spontaneous emission of a single quantum emitter leading to a Purcell factor as high as 106 and enables single-photon coupling efficiency as high as 86% into fiber-guided modes. The introduction of the slot enhances the Purcell factor by six times as compared to the ONF cavity structure without slot, and the asymmetric cavity design enables unidirectional coupling of single photons. The cavity is designed to minimize the losses leading to a scattering-limited Q-factor and one-pass loss estimated to be 6388 and 1.2%, respectively. This fiber-coupled single-photon device may open advanced possibilities and applications for quantum information processing.
Scientific journal - Single-sided cavity quantum electrodynamics effects on an optical nanofiber
Ramachandrarao Yalla; K. Muhammed Shafi; Kali P Nayak
Frontiers in Optics + Laser Science 2023 (FiO, LS), Optica Publishing Group, Oct. 2023, Peer-reviwed, We present the single-sided cavity-QED effects for single quantum emitters by combining an asymmetric defect mode grating with an optical nanofiber (ONF). We demonstrate significantly enhanced spontaneous emission into one side of the ONF.
International conference proceedings - Plasmon Enhanced Polarized Single Photon Emission into Optical Fiber
K. Muhammed Shafi; Ramachandrarao Yalla; Kali P. Nayak
Optica Quantum 2.0 Conference and Exhibition, Optica Publishing Group, Jun. 2023, Peer-reviwed, We demonstrate a bright and strongly polarized single-photon source directly coupled into an optical fiber. The system is realized by combining single quantum dots and gold nanorods on optical nanofiber.
International conference proceedings - Silicon-vacancy nanodiamonds on an optical nanofiber for quantum technologies
Ramachandrarao Yalla; Y. Kojima; Y. Fukumoto; H. Suzuki; O. Ariyada; K. M. Shafi; K. P. Nayak
Optica Quantum 2.0 Conference and Exhibition, Optica Publishing Group, Jun. 2023, Peer-reviwed, We demonstrate a fiber-based hybrid nanophotonic device by combining an optical nanofiber and nanodiamonds with silicon-vacancy centers. The current work will lead to intriguing research and applications in quantum technologies.
International conference proceedings - Bright and Polarized Fiber In-Line Single-Photon Source Based on Plasmon-Enhanced Emission into Nanofiber Guided Modes
K. Muhammed Shafi, Ramachandrarao Yalla, and Kali P. Nayak
Corresponding, Phys. Rev. Applied, American Physical Society (APS), 19, 3, 034008-1-034008-9, 02 Mar. 2023, Peer-reviwed, True
Scientific journal, English - Optimization of nanofiber gratings for efficient single-photon collection
S. Sahu; K. P. Nayak; R. Jha
Journal of Optics, IOP Science, 24, 11, 115401-1-115401-7, 13 Oct. 2022, Peer-reviwed
Scientific journal, English - Plasmon Enhanced Polarized Single Photon Emission Into Fiber Guided Modes
K. P. Nayak; K. M. Shafi; R. Yalla
Lead, Frontiers in Optics + Laser Science 2022 (FIO, LS), Optica Publishing Group, JTu5B.26, Oct. 2022, Peer-reviwed, We demonstrate that emission properties of single quantum dots can be strongly enhanced in presence of single gold nanorods leading to a bright and strongly polarized single photon emission into an optical nanofiber.
International conference proceedings, English - Tunable coupling of a single quantum emitter to a composite nanofiber cavity
R. Yalla; K. M. Shafi; K. P. Nayak; K. Hakuta
Conference on Lasers and Electro-Optics/Pacific Rim, CTuP7C_08, Aug. 2022, Peer-reviwed
International conference proceedings, English - Integration of silicon-vacancy centers in nanodiamonds with an optical nanofiber
R. Yalla; Y. Kojima; Y. Fukumoto; H. Suzuki; O. Ariyada; K. M. Shafi; K. P. Nayak; K. Hakuta
Applied Physics Letters, American Institute of Physics (AIP), 120, 241102-1-241102-7, 13 Jun. 2022, Peer-reviwed
Scientific journal, English - One-sided cavity on an optical nanofiber using a composite technique
R. Yalla; K. M. Shafi; K. P. Nayak; K. Hakuta
Conference on Lasers and Electro-Optics (CLEO 2022), Technical Digest Series, Optica Publishing Group, JW3B.139, 15 May 2022, Peer-reviwed
International conference proceedings, English - One-sided composite cavity on an optical nanofiber for cavity QED
R. Yalla; K. M. Shafi; K. P. Nayak; K. Hakuta
Applied Physics Letters, American Institute of Physics (AIP), 120, 071108-1-071108-6, 16 Feb. 2022, Peer-reviwed
Scientific journal, English - Manipulation of Laser-cooled Atoms Using an Optical Nanofiber
K. P. Nayak
Vacuum and Surface Science, Vol. 63, No. 10, 530-535, 2020, Peer-reviwed, Invited
Scientific journal, English - Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber
K. M. Shafi, K. P. Nayak, A. Miyanaga, and K. Hakuta
Corresponding, Applied Physics B, 126, 58, 2020, Peer-reviwed
Scientific journal, English - Coherent interaction of orthogonal polarization modes in a photonic crystal nanofiber cavity
J. Keloth; K. P. Nayak; J. Wang; M. Morinaga; K. Hakuta
Optics Express, Vol. 27, 1453-1466, 16 Jan. 2019, Peer-reviwed
Scientific journal, English - Real-time observation of single atoms trapped and interfaced to a nanofiber cavity
K. P. Nayak, J. Wang, and J. Keloth
Lead, Physical Review Letters, 123, 213602, 2019, Peer-reviwed
Scientific journal, English - Photothermal tuning and stabilization of a photonic crystal nanofiber cavity
J. Wang, K. P. Nayak, and J. Keloth
Lead, Optics Letters, 44, 3996, 2019, Peer-reviwed
Scientific journal, English - Two-mode interference in a photonic crystal nanofiber cavity
J. Keloth; K. P. Nayak; J. Wang; M. Morinaga; K. Hakuta
European Optical Society Biennial Meeting, 1, 2018
International conference proceedings, English - Fabrication of a centimeter-long cavity on nanofiber for strong-coupling regime of cavity QED
Jameesh Keloth; K P Nayak; Jie Wang; K Hakuta
Photonics Conference (IPC), 2017 IEEE, 465-466, Oct. 2017
International conference proceedings, English - Composite device for interfacing an array of atoms with a single nanophotonic cavity mode
Mark Sadgrove; Kali P. Nayak
NEW JOURNAL OF PHYSICS, IOP PUBLISHING LTD, 19, 063003, Jun. 2017, Peer-reviwed, We propose a method of trapping atoms in arrays near to the surface of a composite nanophotonic device with optimal coupling to a single cavity mode. The device, comprised of a nanofiber mounted on a grating, allows the formation of periodic optical trapping potentials near to the nanofiber surface along with a high cooperativity nanofiber cavity. We model the device analytically and find good agreement with numerical simulations. Wenumerically demonstrate that for an experimentally realistic device, an array of traps can be formed whose centers coincide with the antinodes of a single cavity mode, guaranteeing optimal coupling to the cavity. Additionally, we simulate a trap suitable for a single atom within 100 nm of the fiber surface, potentially allowing larger coupling to the nanofiber than found using typical guided mode trapping techniques.
Scientific journal, English - Fabrication of a centimeter-long cavity on a nanofiber for cavity quantum electrodynamics
Jameesh Keloth; K. P. Nayak; K. Hakuta
OPTICS LETTERS, OPTICAL SOC AMER, 42, 5, 1003-1006, Mar. 2017, Peer-reviwed, We report the fabrication of a 1.2 cm long cavity directly on a nanofiber using femtosecond laser ablation. The cavity modes with finesse values in the range of 200-400 can enable the " strong-coupling" regime of cavity QED, with high cooperativity of 10-20, for a single atom trapped 200 nm away from the fiber surface [Phys. Rev. A 80, 053826 (2009)]. Such cavity modes can still maintain the transmission between 40%-60%, suggesting a one-pass intracavity transmission of 99.53%. Other cavity modes, which can enable cooperativity in the range of 3-10, show transmission over 60%-85% and are suitable for fiber-based singlephoton sources and quantum nonlinear optics in the " Purcell" regime. (C) 2017 Optical Society of America
Scientific journal, English - Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Kali Prasanna Nayak; Jameesh Keloth; Kohzo Hakuta
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS, JOURNAL OF VISUALIZED EXPERIMENTS, Vol. 120, 120, e55136, Feb. 2017, Peer-reviwed, We present a protocol for fabricating 1-D Photonic Crystal (PhC) cavities on subwavelength-diameter tapered optical fibers, optical nanofibers, using femtosecond laser-induced ablation. We show that thousands of periodic nano-craters are fabricated on an optical nanofiber by irradiating with just a single femtosecond laser pulse. For a typical sample, periodic nano-craters with a period of 350 nm and with diameter gradually varying from 50 - 250 nm over a length of 1 mm are fabricated on a nanofiber with diameter around 450 - 550 nm. A key aspect of such a nanofabrication is that the nanofiber itself acts as a cylindrical lens and focuses the femtosecond laser beam on its shadow surface. Moreover, the single-shot fabrication makes it immune to mechanical instabilities and other fabrication imperfections. Such periodic nano-craters on nanofiber, act as a 1-D PhC and enable strong and broadband reflection while maintaining the high transmission out of the stopband. We also present a method to control the profile of the nano-crater array to fabricate apodized and defect-induced PhC cavities on the nanofiber. The strong confinement of the field, both transverse and longitudinal, in the nanofiber-based PhC cavities and the efficient integration to the fiber networks, may open new possibilities for nanophotonic applications and quantum information science.
Scientific journal, English - Optical Nanofiber Cavity For Quantum Photonics
K. P. Nayak; J. Keloth; J. Wang; K. Hakuta
The 24th Congress of the International Commission for Optics, F1H-03, 2017
International conference proceedings, English - Efficient fiber-optical interface for nanophotonic devices
T. G. Tiecke; K. P. Nayak; J. D. Thompson; T. Peyronel; N. P. de Leon; V. Vuletic; M. D. Lukin
OPTICA, OPTICAL SOC AMER, 2, 2, 70-75, Feb. 2015, Peer-reviwed, We demonstrate a method for efficient coupling of guided light from a single-mode optical fiber to nanophotonic devices. Our approach makes use of single-sided conical tapered optical fibers that are evanescently coupled over the last similar to 10 mu m to a nanophotonic waveguide. By means of adiabatic mode transfer using a properly chosen taper, single-mode fiber-waveguide coupling efficiencies as high as 97 (1)% are achieved. Efficient coupling is obtained for a wide range of device geometries, which are either singly clamped on a chip or attached to the fiber, demonstrating a promising approach for integrated nanophotonic circuits, and quantum optical and nanoscale sensing applications. (C) 2015 Optical Society of America
Scientific journal, English - 24pAN-2 Photonic crystal nanofber cavity using an external grating : towards optimized design and control
Sadgrove M.; Yalla R.; Nayak K. P.; Hakuta K.
Meeting Abstracts of the Physical Society of Japan, The Physical Society of Japan (JPS), 70, 782-782, 2015
Japanese - Cavity Quantum Electrodynamics on a Nanofiber Using a Composite Photonic Crystal Cavity
Ramachandrarao Yalla; Mark Sadgrove; Kali P. Nayak; Kohzo Hakuta
PHYSICAL REVIEW LETTERS, AMER PHYSICAL SOC, 113, 14, 143601, Sep. 2014, Peer-reviwed, We demonstrate cavity QED conditions in the Purcell regime for single quantum emitters on the surface of an optical nanofiber. The cavity is formed by combining an optical nanofiber and a nanofabricated grating to create a composite photonic crystal cavity. By using this technique, significant enhancement of the spontaneous emission rate into the nanofiber guided modes is observed for single quantum dots. Our results pave the way for enhanced on-fiber light-matter interfaces with clear applications to quantum networks.
Scientific journal, English - Composite Photonic Crystal Cavity on a Nanofiber
Mark Sadgrove; Ramachandrarao Yalla; Kali P. Nayak; Kohzo Hakuta
2014 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE, 2014, Peer-reviwed, We realize a photonic crystal cavity by mounting an optical nanofiber on a nanostructured grating which includes a designed defect. The device has a Q -factor 1000 and excellent coupling to the nanofiber fundamental mode. (C) 2014 Optical Society of America
International conference proceedings, English - Optical nanofiber-based photonic crystal cavity
K. P. Nayak; Pengfei Zhang; K. Hakuta
OPTICS LETTERS, OPTICAL SOC AMER, 39, 2, 232-235, Jan. 2014, Peer-reviwed, We demonstrate the fabrication of photonic crystal (PhC) cavities on optical nanofibers using femtosecond laser ablation. PhC cavities with cavity lengths varying from 0.54 to 3.43 mm are fabricated by controlling the profile of the nanocrater array formed on the nanofiber. Such PhC cavities show high transmission of 87% for a finesse of 39. For higher finesse values from 150 to 500, the transmission can still be maintained at 20%-25%. Due to the strong confinement of the field and the efficient coupling to single-mode optical fibers, such nanofiber-based PhC cavities may become an interface between quantum and classical networks. (C) 2014 Optical Society of America
Scientific journal, English - Photoabsorption of Few Atoms Using Photonic Crystal Cavity Based on Nanofiber
Pengfei Zhang; Jameesh Keloth; Kali Nayak; Kohzo Hakuta
Asia Communications and Photonics Conference, ATh3A. 103, 2014
International conference proceedings, English - Photonic crystal nanofiber using an external grating
Mark Sadgrove; Ramachandrarao Yalla; Kali P. Nayak; Kohzo Hakuta
Optics Letters, 38, 14, 2542-2545, 15 Jul. 2013, Peer-reviwed, We implemented a photonic crystal nanofiber device by reversibly combining an optical nanofiber and a nanofabricated grating. Using the finite-difference time-domain method, we designed the system for minimal optical loss while tailoring the resonant wavelength and bandwidth of the device. Experimentally, we demonstrated that the combined system shows a strong photonic stop band in good agreement with numerical predictions. The resulting device may be used to realize strong light-matter coupling near the nanofiber surface. © 2013 Optical Society of America.
Scientific journal, English - Photonic crystal formation on optical nanofibers using femtosecond laser ablation technique
K. P. Nayak; K. Hakuta
OPTICS EXPRESS, OPTICAL SOC AMER, 21, 2, 2480-2490, Jan. 2013, Peer-reviwed, We demonstrate that thousands of periodic nano-craters are fabricated on a subwavelength-diameter tapered optical fiber, an optical nanofiber, by irradiating with just a single femtosecond laser pulse. A key aspect of the fabrication is that the nanofiber itself acts as a cylindrical lens and focuses the femtosecond laser beam on its shadow surface. We also demonstrate that the periodic nano-crater array on the nanofiber shows polarization dependent fiber Bragg grating (FBG) characteristics. Such FBG structures on the nanofiber may act as a 1-D photonic crystal due to the strong transverse and longitudinal confinement of the field. (C) 2013 Optical Society of America
Scientific journal, English - Photonic Crystal Formation On Tapered Optical Nanofibers Using Femtosecond Laser Ablation Technique
K. P. Nayak; K. Hakuta
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE, QTu2B.2, 2013, We demonstrate that thousands of periodic nano-craters are fabricated on a tapered optical nanofiber, by irradiating just a single femtosecond laser pulse. Such periodic nano-craters on the nanofiber, act as a 1-D photonic crystal.
International conference proceedings, English - Fabrication of Photonic Crystal on Tapered Nanofibers Using a Femtosecond Laser
K. P. Nayak; K. Hakuta
2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR), IEEE, ThI3-4, 2013, We demonstrate that thousands of periodic nano-craters are fabricated on a tapered optical nanofiber, by irradiating with just a single femtosecond laser pulse. The periodic nano-craters on the nanofiber, act as a 1-D photonic crystal.
International conference proceedings, English - Spectroscopy of near-surface atoms using an optical nanofiber
K. P. Nayak; Manoj Das; Fam Le Kien; K. Hakuta
OPTICS COMMUNICATIONS, ELSEVIER SCIENCE BV, 285, 23, 4698-4704, Oct. 2012, Peer-reviwed, We investigate the laser induced fluorescence spectra of laser-cooled Cesium atoms in the vicinity of a silica nanofiber by observing the fluorescence photons through the guided-modes. The observed excitation spectra of such near-surface atoms reveal drastic difference from free-space atom and show signatures of atom-surface bound states. We experimentally demonstrate that the spectrum lineshape and hence the loading into such surface bound states can be controlled by changing the surface conditions. The measured emission spectra, under the controlled surface conditions, further clarify the behavior of free- and bound-atoms. We discuss the possible roles of adsorption and desorption of atoms in controlling the surface conditions. (C) 2012 Elsevier B.V. All rights reserved.
Scientific journal, English - Nanofibers with Bragg gratings from equidistant holes
Fam Le Kien; K. P. Nayak; K. Hakuta
JOURNAL OF MODERN OPTICS, TAYLOR & FRANCIS LTD, 59, 3, 274-286, 2012, Peer-reviwed, We study nanofibers with Bragg gratings from equidistant holes. We calculate analytically and numerically the reflection and transmission coefficients for a single grating and also for a cavity formed by two gratings. We show that the reflection and transmission coefficients of the gratings substantially depend on the number of holes, the hole length, the hole depth, the grating period, and the light wavelength. We find that the reflection and transmission coefficients of the gratings depend on the orientation of the polarization vector of light with respect to the holes. Such a dependence is a result of the fact that the cross-section of the gratings is not cylindrically symmetric.
Scientific journal, English - Fluorescence photon measurements from single quantum dots on an optical nanofiber
Ramachandrarao Yalla; K. P. Nayak; K. Hakuta
OPTICS EXPRESS, OPTICAL SOC AMER, 20, 3, 2932-2941, Jan. 2012, Peer-reviwed, We experimentally investigate the fluorescence photon emission characteristics for single q-dots by using optical nanofibers. We demonstrate that single q-dots can be deposited along an optical nanofiber systematically and reproducibly with a precision of 5 mu m. For single q-dots on an optical nanofiber, we measure the fluorescence photon numbers coupled into the nanofiber and the normalized photon correlations, by varying the excitation laser intensity. We estimate the fluorescence photon coupling efficiency into the nanofiber guided modes. (C) 2012 Optical Society of America
Scientific journal, English - Fabrication of Optical Nanofiber Cavity Using Focused Ion Beam Milling
K. P. Nayak; Y. Kawai; F. L. Kien; K. Nakajima; H. Miyazaki; Y. Sugimoto; K. Hakuta
Quantum Information and Measurement in Proceedings Research in Optical Sciences, QW4B. 4, 2012
International conference proceedings, English - Cavity formation on an optical nanofiber using focused ion beam milling technique
K. P. Nayak; Fam Le Kien; Y. Kawai; K. Hakuta; K. Nakajima; H. T. Miyazaki; Y. Sugimoto
OPTICS EXPRESS, OPTICAL SOC AMER, 19, 15, 14040-14050, Jul. 2011, Peer-reviwed, We present the experimental realization of nanofiber Bragg grating (NFBG) by drilling periodic nano-grooves on a subwavelength-diameter silica fiber using focused ion beam milling technique. Using such NFBG structures we have realized nanofiber cavity systems. The typical finesse of such nanofiber cavity is F similar to 20 - 120 and the on-resonance transmission is similar to 30 - 80%. Moreover the structural symmetry of such NFBGs results in polarization-selective modes in the nanofiber cavity. Due to the strong confinement of the field in the guided mode, such a nanofiber cavity can become a promising workbench for cavity QED. (C) 2011 Optical Society of America
Scientific journal, English - FBG-Nano-Cavity on an Optical Nanofiber
K. P. Nayak; K. Nakajima; F. L. Kien; H. Miyazaki; Y. Sugimoto; K. Hakuta
SPIE Photonics West, 7913-44, 2011
International conference proceedings, English - Nano-Structured Optical Nanofibers For Cavity-QED
K. P. Nayak; Fam Le Kien; K. Nakajima; H. T. Miyazaki; Y. Sugimoto; K. Hakuta
2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE, QFC-2, 2011, We show that optical nanofiber cavity can be realized by drilling periodic nano-grooves on a sub-wavelength diameter silica fiber using focused ion beam milling. Due to both transverse and longitudinal confinement of the field, such a nanofiber cavity can become a promising workbench for cavity-QED.
International conference proceedings, English - Nano-Structured Optical Nanofibers For Cavity-QED
K. P. Nayak; Fam Le Kien; K. Nakajima; H. T. Miyazaki; Y. Sugimoto; K. Hakuta
2011 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO), IEEE, B-9-O24-021, 2011, We show that optical nanofiber cavity can be realized by drilling periodic nano-grooves on a sub-wavelength diameter silica fiber using focused ion beam milling. Due to both transverse and longitudinal confinement of the field, such a nanofiber cavity can become a promising workbench for cavity-QED.
International conference proceedings, English - Optical Nanofiber Cavity: A Novel Workbench For Cavity-QED
K. P. Nayak; K. Nakajima; Fam Le Kien; H. T. Miyazaki; Y. Sugimoto; K. Hakuta
Frontiers in Optics/Laser Science (FIO/LS), 1, Oct. 2010, Peer-reviwed
International conference proceedings, English - Measurement of fluorescence emission spectrum of few strongly driven atoms using an optical nanofiber
Manoj Das; A. Shirasaki; K. P. Nayak; M. Morinaga; Fam Le Kien; K. Hakuta
OPTICS EXPRESS, OPTICAL SOC AMER, 18, 16, 17154-17164, Aug. 2010, Peer-reviwed, We show that the fluorescence emission spectrum of few atoms can be measured by using an optical nanofiber combined with the optical heterodyne and photon correlation spectroscopy. The observed fluorescence spectrum of the atoms near the nanofiber shows negligible effects of the atom-surface interaction and agrees well with the Mollow triplet spectrum of free-space atoms at high excitation intensity. (C) 2010 Optical Society of America
Scientific journal, English - Optical Nanofibers for Manipulating Atoms and Photons
K. P. Nayak; Manoj Das; Fam Le Kien; K. Hakuta
19th International Conference on Laser Spectroscopy, 1, Jun. 2009, Peer-reviwed
International conference proceedings, English - Antibunching and bunching of photons in resonance fluorescence from a few atoms into guided modes of an optical nanofiber
K. P. Nayak; Fam Le Kien; M. Morinaga; K. Hakuta
Physical Review A, Vol. 79, 021801(R), 2009, Peer-reviwed
Scientific journal, English - Single atoms on an optical nanofibre
K. P. Nayak; K. Hakuta
NEW JOURNAL OF PHYSICS, IOP PUBLISHING LTD, 10, 053003( 9), May 2008, Peer-reviwed, We show that single atoms can be detected using a sub-wavelength-diameter silica-fibre, an optical nanofibre, and the fact that single photons spontaneously emitted from the atoms can be readily guided into a single-mode optical fibre. Moreover, we find that single atoms around the nanofibre reveal a very prominent spectral feature, that is, the excitation spectrum splits into two peaks with a very small separation, smaller than the natural linewidth.
Scientific journal, English - Single atoms on an Optical Nanofiber
K. P. Nayak; Fam Le Kien; K. Hakuta
International Symposium on Quantum-Atom Optics, 1, Dec. 2007, Peer-reviwed
International conference proceedings, English - Optical nanofiber as an efficient tool for manipulating and probing atomic fluorescence
K. P. Nayak; P. N. Melentiev; M. Morinaga; Fam Le Kien; V. I. Balykin; K. Hakuta
OPTICS EXPRESS, OPTICAL SOC AMER, 15, 9, 5431-5438, Apr. 2007, Peer-reviwed, We experimentally demonstrate efficient coupling of atomic fluorescence to the guided mode of a subwavelength-diameter silica fiber, an optical nanofiber. We show that fluorescence of a very small number of atoms, around the nanofiber can be readily observed through a single-mode optical fiber. We also show that such a technique enables us to probe the van der Waals interaction between atoms and surface with high precision by observing the fluorescence excitation spectrum through the nanofiber. (C) 2007 Optical Society of America.
Scientific journal, English - Optical nanofibers for manipulating and probing single-atom fluorescence
K. P. Nayak; P. N. Melentiev; M. Morinaga; Fam Le Kien; V. I. Balykin; K. Hakuta
Conference on Lasers and Electro-Optics Europe - Technical Digest, 1, 2007, Peer-reviwed
International conference proceedings, English - Efficient probing of few atom fluorescence through the guided mode of an optical nanofiber
K. P. Nayak; P. N. Melentiev; Nl Morinaga; Fam Le Kien; V. I. Balykin; K. Hakuta
2007 PACIFIC RIM CONFERENCE ON LASERS AND ELECTRO-OPTICS, VOLS 1-4, IEEE, 1137-+, 2007, Peer-reviwed, We show that fluorescence of a very small number of atoms around a subwavelength-diameter silica-fiber, an optical nanofiber, can be measured efficiently by detecting the photons coupled to the guided mode of the nanofiber. Also such a technique enables us to probe the van der Waals interaction between atoms and surface with high precision.
International conference proceedings, English - Single atom as a light coupler for a nanofiber
K. P. Nayak; T. Inoue; M. Morinaga; V. I. Balykin; Fam Le Kien; K. Hakuta
Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006, 1, 2006, Peer-reviwed, We show how an atom can couple light to a nanobody efficiently. We demonstrate that a significant fraction of emission from the atom can be channeled into guided modes of a nanofiber. © 2006 Optical Society of America.
International conference proceedings, English - Nanofiber-mediated radiative transfer between two distant atoms
Fam Le Kien; S. Dutta Gupta; K. P. Nayak; K. Hakuta
Physical Review A,, Vol. 72, 063815(11), Dec. 2005, Peer-reviwed
Scientific journal, English
MISC
- Nanofiber quantum photonics
K. P. Nayak; M. Sadgrove; R. Yalla; F. L. Kien; K. Hakuta
2018, J. Opt., Vol. 20, 073001, English, Peer-reviwed, Introduction scientific journal - 9pAZ-10 Realization of a photonic crystal nanofber cavity using an external grating
Sadgrove M.; Yalla R.; Nayak K. P.; Hakuta K.
The Physical Society of Japan (JPS), 22 Aug. 2014, Meeting abstracts of the Physical Society of Japan, 69, 2, 95-95, Japanese, 1342-8349, 110009875526, AA11439205 - 9pAZ-9 Enhanced Spontaneous Emission on a Nanofiber Using a Composite Photonic Crystal Cavity
Yalla Ramachandrarao; Sadgrove M.; Nayak K. P.; Hakuta K.
The Physical Society of Japan (JPS), 22 Aug. 2014, Meeting abstracts of the Physical Society of Japan, 69, 2, 95-95, English, 1342-8349, 110009875525, AA11439205 - Realization of a photonic crystal nanofber using an external grating
Sadgrove M.; Yalla R.; Nayak K.P; Hakuta K.
The Physical Society of Japan (JPS), 26 Aug. 2013, Meeting abstracts of the Physical Society of Japan, 68, 2, 147-147, Japanese, 1342-8349, 110009754662, AA11439205 - 24aBE-1 Fabrication of nanofiber Bragg grating using UV femtosecond laser
Sakata S.; Nayak K. P.; Hakuta K.
The Physical Society of Japan (JPS), 05 Mar. 2012, Meeting abstracts of the Physical Society of Japan, 67, 1, 181-181, Japanese, 1342-8349, 110009565476, AA11439205 - 22aZA-4 Observations of Fluorescence Photons From A Few Quantum Dots Using Optical Nanofibers
Kaji I.; Nayak K. P.; Morinaga M.; Okuno T.; Hakuta K.
The Physical Society of Japan (JPS), 25 Aug. 2008, Meeting abstracts of the Physical Society of Japan, 63, 2, 124-124, Japanese, 1342-8349, 110006982842, AA11439205 - 28aRE-9 Manipulation of Atom and Light Using a Nanofiber
Nayak Kali; Inoue T.; Morinaga M.; Balykin V.I.; Hakuta K.
The Physical Society of Japan (JPS), 04 Mar. 2006, Meeting abstracts of the Physical Society of Japan, 61, 1, 149-149, Japanese, 1342-8349, 110007181667, AA11439205 - 20pWA-9 Manipulation of Spontaneous Emission Using Sub-Wavelrength Silica Fiber
Kien Fam Le; NayaK Kali; Gupta S. Dutta; Morinaga M.; Hakuta K.
The Physical Society of Japan (JPS), 19 Aug. 2005, Meeting abstracts of the Physical Society of Japan, 60, 2, 67-67, Japanese, 1342-8349, 110004537718, AA11439205
Lectures, oral presentations, etc.
- Plasmon Enhanced Polarized Single Photon Emission Into Fiber Guided Modes
K. P. Nayak; K. M. Shafi; R. Yalla
Poster presentation, English, Frontiers in Optics + Laser Science meeting (FIO-LS) 2022, Optica, Rochester, USA, International conference
18 Oct. 2022 - Quantum photonics on an all-fiber platform
K. P. Nayak
Invited oral presentation, English, 2022 International Conference on Optical Precision Measurements, Invited, Taiyuan University of Technology, China, International conference
18 Sep. 2022 - Plasmon-enhanced bright and polarized single photon emission into nanofiber guided modes
K. P. Nayak; K. M. Shafi; R. Yalla
Oral presentation, English, The Physical Society of Japan (JPS) 2022 Autumn Meeting, The Physical Society of Japan, Tokyo Institute of Technology, Domestic conference
13 Sep. 2022 - A single atom quantum interface on a tapered optical fiber
K. P. Nayak
Invited oral presentation, English, Laser Based Sensors, Optical Sensors Conference 2022 (as part of Optica Optical Sensors and Sensing Congress 2022), Invited, Optica, Vancouver, Canada, International conference
14 Jul. 2022 - Development of photonic crystal cavities on a 300 nm silica nanofiber for single atom quantum interface
Kali P. Nayak
Poster presentation, English, International Symposium on Novel maTerials and quantum Technologies (ISNTT 2021), NTT Basic Research Laboratories, Japan., Online Conference, International conference
15 Dec. 2021 - Interfacing a single quantum emitter to fiber-guided photons
K. P. Nayak
Others, English, Virtual Seminar OIST, Japan, Invited, Online
13 Jan. 2021 - Interfacing individually trapped single atoms to a nanofiber cavity
K. P. Nayak
Invited oral presentation, English, 3rd Asia‐Pacific Workshop on Trapped Quantum Systems (APTQS 2020), 28-30th October 2020, Invited, Online Conference, hosted by Osaka University, Japan., International conference
2020 - A quantum interface between a trapped single atom and fiber-guided photons
K. P. Nayak
Oral presentation, English, The 43rd Quantum Information Technology Symposium (QIT43), 10-11th December 2020., Online Conference, hosted by University of Electro-Communications, Japan., Domestic conference
2020 - Interfacing trapped single atoms to a nanofiber cavity
K. P. Nayak; J. Wang; J. Keloth; K. Hakuta
Oral presentation, English, Physical Society of Japan
17 Mar. 2019 - 直径 300 nm のナノ光ファイバー共振器の作製と特性測定
福原美穂; K. P. Nayak; 宮本洋子
Oral presentation, Japanese, 日本光学会 Optics and Photonics Japan 2019 講演予稿集, Domestic conference
2019 - Fano-type resonances and avoided crossing in a photonic crystal nanofiber cavity
J. Keloth; K. P. Nayak; J. Wang; M. Morinaga; K. Hakuta
Poster presentation, English, International Workshop on Photonics Polymer for Innovation (IWPPI)
15 Oct. 2018 - Stabilization of a centimeter-long photonic crystal nanofiber cavity under ultra-high vacuum condition
Kali P. Nayak; Jie Wang; Jameesh Keloth; Kohzo Hakuta
Oral presentation, English, Physical Society of Japan
Sep. 2018 - Fano-type resonances and avoided crossing in a photonic crystal nanofiber cavity
J. Keloth; K. P. Nayak; J. Wang; M. Morinaga; K. Hakuta
Oral presentation, English, Physical Society of Japan
Sep. 2018 - Investigation of Fano-type resonances in nanofiber based photonic crystal cavity
K. P. Nayak; J. Keloth; M. Morinaga; K. Hakuta
Invited oral presentation, English, SPIE Photonics West, Steep Dispersion Engineering and Opto-Atomic Precision Metrology XI, SPIE Photonics West, OPTO, USA, International conference
Jan. 2018 - Developing optical nanofiber cavity for a quantum interface
K. P. Nayak
Invited oral presentation, English, International Symposium on Photonics and Optical Communications, RIEC, Tohoku University, Sendai, Japan., International conference
Oct. 2017 - Nanofiber quantum photonics
K. P. Nayak; R. Yalla; J. Keloth; K. Hakuta
Invited oral presentation, English, SPIE Photonics West, Slow Light, Fast Light, and Opto-Atomic Precision Metrology X, SPIE Photonics West, OPTO, USA, International conference
Jan. 2017 - Trapping Single Atoms on a Photonic Crystal Nanofiber
Kali P Nayak; Yanqiang Guo; Jameesh Keloth; Tetsuo Kishimoto; Kohzo Hakuta
Oral presentation, English, Physical Society of Japan
Mar. 2016 - Optical nanofibers for quantum information application
K. P. Nayak; K. Hakuta
Invited oral presentation, English, The 8th IEEE/ International Conference on Advanced Infocomm Technology, Hangzhou, China, International conference
Oct. 2015 - Fabrication of Nanofiber Bragg Grating Using Femtosecond Laser Talbot Interferometric Setup
K P Nayak; K Hakuta
Oral presentation, English, Physical Society of Japan
Aug. 2012 - Manipulating Light Propagation using Optical-Nanofiber Cavity
K. P. Nayak; F. L. Kien; K. Hakuta
Invited oral presentation, English, SPIE Photonics West, Advances in Slow and Fast Light V,, SPIE Photonics West, Advances in Slow and Fast Light V, USA, International conference
2012 - Cavity Formation on an Optical Nanofiber using Focused Ion Beam Milling Technique
KP Nayak; Fam Le Kien; K Nakajima; Y Kawai; HT Miyazaki; Y Sugimoto; K Hakuta
Oral presentation, English, Physical Society of Japan
Aug. 2011 - Optical Nanofiber Cavity: A Novel Workbench For Cavity-QED-II
K. P. Nayak; K. Nakajima; Y. Kawai; Fam Le Kien; H. T. Miyazaki; Y. Sugimoto; K. Hakuta
Oral presentation, English, Physical Society of Japan
Mar. 2011 - Manipulating slow light propagation using optical nanofibers with low finesse cavity
Kohzo Hakuta; Kali P. Nayak; Fam L. Kien
Invited oral presentation, English, SPIE Photonics West, Advances in Slow and Fast Light IV,, SPIE Photonics West, Advances in Slow and Fast Light IV, USA, International conference
2011 - Optical Nanofiber Cavity: A Novel Workbench For Cavity-QED
K. P. Nayak; K. Nakajima; Y. Kawai; Fam Le Kien; H. T. Miyazaki; Y. Sugimoto; K. Hakuta
Oral presentation, English, Physical Society of Japan
Sep. 2010 - Manipulating Quantum States of Light and Matter using an Optical Nanofiber
K. P. Nayak; Fam Le Kien; K. Hakuta
Invited oral presentation, English, Optical Fiber Communications/National Fiber Optic Engineers Conference (OFC/NFOEC), OSA (The Optical Society), San Diego, International conference
Mar. 2010 - Two-Color Evanescent Field Trapping of Atoms Around an Optical Nanofiber
K. P. Nayak; K. Miyazaki; K. Hakuta
Oral presentation, English, Physical Society of Japan
Mar. 2010 - Trapping Atoms Around An Optical Nanofiber
K. P. Nayak; Manoj Das; Fam Le Kien; K. Hakuta
Oral presentation, English, Physical Society of Japan
Sep. 2009 - Investigation of near-surface atoms using an optical nanofiber
K.P. Nayak; Fam Le Kien; K. Hakuta
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2009 - ナノ光ファイバー近接場中のセシウム原子のレーザー誘起蛍光スペクトルの観測
白崎昭生; Das Manoj; K.P. Nayak; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2009 - ナノ光ファイバー表面上の少数個の量子ドットの蛍光観測II
鍛治一平; 上本真輔; K.P. Nayak; 奥野剛史; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2009 - Optical Nanofibers for Manipulating Atoms and Photons
K. P. Nayak; Fam Le Kien; K. Hakuta
Invited oral presentation, English, 39th Winter Colloquium on the Physics of Quantum Electronics (PQE2009), PQE2009, (Snowbird, Utah, U. S. A., International conference
Jan. 2009 - ナノ光ファイバー上の単一量子ドットの蛍光の観測
鍛治一平; K. P. Nayak; 森永実; 奥野剛史; 白田耕藏
Oral presentation, English, 電通大/農工大21世紀COEプログラム合同シンポジウム
Dec. 2008 - Cavity enhanced nonlinear optics with sub-wavelength diameter optical fiber
Manoj Das; K. P. Nayak; Fam Le Kien; K. Hakuta
Oral presentation, English, 農工大/電通大 第5回合同シンポジウム
Dec. 2008 - Antibunching and bunching in a few atoms resonance fluorescence measured through a nanofiber-II: Effect of excitation and observation geometries
K. P. Nayak; Fam Le Kien; K. Hakuta
Oral presentation, English, 日本物理学会,日本物理学会秋季大会
Sep. 2008 - ナノ光ファイバー近接場領域の少数個の量子ドットの蛍光観測
鍛治一平; K.P. Nayak; 森永実; 奥野剛史; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会秋季大会 (盛岡)、2008年9月
Sep. 2008 - Antibunching and bunching in a few atoms resonance fluorescence measured through a nanofiber
K.P. Nayak; Fam Le Kien; K. Hakuta
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2008 - Manipulating single atoms and single photons using an optical nanofiber
K. P. Nayak; Manoj Das; Fam Le Kien; K. Hakuta
Oral presentation, English, 第4回電通大/農工大21世紀COEプログラム合同シンポジウム
Dec. 2007 - ナノ光ファイバー上の1次元配列原子群による超放射制御（理論）
Fam Le Kien; K.P. Nayak; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会秋季大会
Sep. 2007 - Single Atoms on an Optical Nanofiber I : Photon Correlation Measurements
Kali Prasanna Nayak; Kohzo Hakuta
Oral presentation, English, 日本物理学会,日本物理学会秋季大会
Sep. 2007 - ナノ光ファイバによる冷却原子とシリカ表面の相互作用
K.P. Nayak; M. Das; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2007 - Optical Nanofibers for Manipulating and Probing Single Atom Fluoresence
Kali Nayak; Manoj Das; Fam Le Kien; K. Hakuta
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2007 - Optical nanofibers for manipulating and probing single-atom fluorescence
K. P. Nayak; P. N. Melentiev; M. Morinaga; V. I. Balykin; Fam Le Kien; K. Hakuta
Oral presentation, English, 第3回農工大/電通大21世紀COEプログラム合同シンポジウム
Dec. 2006 - What observations tell us: Atom trapping by manipulating the surface defect potential?
K. P. Nayak; Manoj Das; K. Hakuta
Oral presentation, English, 第3回農工大/電通大21世紀COEプログラム合同シンポジウム
Dec. 2006 - Optical Nanofiber as an Efficient Tool for Exploring Atom -Surface Interaction : Towards Manipulation of Atoms and Photons using Optical Nanofibers
Kali Nayak; Manoj Das; M. Morinaga; V. I. Balykin; Fam Le Kien; K. Hakuta
Oral presentation, English, 日本物理学会,日本物理学会秋季大会
Sep. 2006 - ナノファイバーによる原子と光の操作
K.P. Nayak; 井上卓; 森永実; V.I. Balykin; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会春季大会
Mar. 2006 - Manipulation of atom and photon using nanofiber
K. P. Nayak; T. Inoue; J. Q. Liang; M. Morinaga; V. I. Balykin; Fam Le Kien; K. Hakuta
Oral presentation, English, 第2回電通大/農工大21世紀COEプログラム合同シンポジウム
Dec. 2005 - サブミクロン光ファイバーによる自然放出の制御
Fam Le Kien; Kali Nayak; S; Dutta Gupta; 森永実; 白田耕藏
Oral presentation, English, 日本物理学会,日本物理学会秋季大会
Sep. 2005
Courses
Affiliated academic society
Research Themes
- Developing a fiber optical quantum interface using trapped atoms and nanofiber based photonic crystal cavity
Nayak Kali Prasanna
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Young Scientists (A), In this project, we have developed an optical tweezer based single atom trap on a photonic crystal (PhC) nanofiber cavity. Fabrication of high quality PhC cavities on nanofibers was demonstrated. The cavities were designed for efficient interfacing of trapped single atoms to nanofiber guided modes. The interference between the cavity modes leading to unique spectral features was investigated. Photo-thermal stabilization of the PhC nanofiber cavities under ultra-high vacuum conditions was achieved. It was demonstrated that single atoms can be successfully trapped on the nanofiber cavity and can be observed in real-time through the fiber guided modes. This enables deterministic preparation of single atom events for quantum photonics applications on an all-fiber platform., 15H05462
01 Apr. 2015 - 31 Mar. 2019 - Manipulation of single atoms/photons using an optical nanofiber wit cavity structure
NAYAK Kali Prasanna
Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, The University of Electro-Communications, Grant-in-Aid for Young Scientists (B), One of the key trends of modern quantum optics it to manipulate the quantum optical properties of atoms using various nano-waveguides. In this project, we investigated methods to improve the freedom of the manipulation using optical nanofibers as nano-waveguides. We developed a method to create cavity structure on an optical nanofiber using femto-laser interfered multi-photon fabrication method. Furthermore, we developed a method to create cavity structure on nanofiber by combining with an external nanostructure device (grating with central defect). Using this method, we demonstrated the spontaneous emission enhancement of a single atom (quantum dot) on a nanofiber., 24740271
01 Apr. 2012 - 31 Mar. 2014