The Experts below are selected from a list of 142122 Experts worldwide ranked by ideXlab platform
Susumu Noda - One of the best experts on this subject based on the ideXlab platform.
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controlling the emission of Quantum dots embedded in photonic crystal nanocavity by manipulating Q Factor and detuning
Physical Review B, 2011Co-Authors: Tatsuya Nakamura, Takashi Asano, Kazunobu Kojima, T Kojima, Susumu NodaAbstract:We investigated the modulation of the Purcell effect by controlling the $Q$-Factor and detuning in a Quantum-dot--nanocavity coupled system. The $Q$-Factor and detuning are controlled independently using a nanocavity and a waveguide reflector formed in a two-dimensional photonic crystal (PC) slab, in combination with a newly developed nitrogen adsorption/desorption method that enables local control of the refractive index. For example, we observed that the emission of a Quantum dot via a cavity mode was increased by 3.3 times when the $Q$-Factor was changed from 3500 to 6900 while keeping the detuning fixed. The dependence of the Purcell effect on the $Q$-Factor has thus been directly observed.
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Increasing the Q Factor and controlling the resonant wavelength of photonic crystal nanocavities
2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009Co-Authors: Yasushi Takahashi, Tomoaki Sugiya, Takashi Asano, Shota Yamada, Yuki Taguchi, Susumu NodaAbstract:We have succeeded in developing a nanocavity with Q Factor over 3 million and arrayed nanocavities in which the variation of resonant wavelengths has a standard deviation as small as ~0.28 nm.
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dynamic control of the Q Factor in a photonic crystal nanocavity
Nature Materials, 2007Co-Authors: Yoshinori Tanaka, Jeremy Upham, Takushi Nagashima, Tomoaki Sugiya, Takashi Asano, Susumu NodaAbstract:High-Quality (Q) Factor photonic-crystal nanocavities are currently the focus of much interest because they can strongly confine photons in a tiny space. Nanocavities with ultrahigh Q Factors of up to 2,000,000 and modal volumes of a cubic wavelength have been realized. If the Q Factor could be dynamically controlled within the lifetime of a photon, significant advances would be expected in areas of physics and engineering such as the slowing and/or stopping of light and Quantum-information processing. For these applications, the transfer, storage and exchange of photons in nanocavity systems on such a timescale are highly desirable. Here, we present the first demonstration of dynamic control of the Q Factor, by constructing a system composed of a nanocavity, a waveguide with nonlinear optical response and a photonic-crystal hetero-interface mirror. The Q Factor of the nanocavity was successfully changed from approximately 3,000 to approximately 12,000 within picoseconds.
F Raineri - One of the best experts on this subject based on the ideXlab platform.
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high Q Factor inp photonic crystal nanobeam cavities on silicon wire waveguides
Optics Letters, 2016Co-Authors: Guillaume Crosnier, Dorian Sanchez, Alexandre Bazin, P Monnier, S Bouchoule, Remy Braive, G Beaudoin, I Sagnes, F RaineriAbstract:High-Quality (Q) Factor indium phosphide (InP)-based 1D photonic crystal nanobeam cavities are fabricated on silicon on insulator waveguides. Through the optimization of the fabrication process, the intrinsic Q Factor of these fully encapsulated nanocavities is demonstrated to attain values higher than 100,000. Experimental and numerical investigations are carried out on the impact, on the Q Factor, of the strength of the evanescent wave coupling between the cavity and the waveguide. We reveal that this coupling can result in a modification of the electromagnetic field distribution in the resonant mode, which gives rise up to a Factor 4 reduction in the intrinsic Q Factor for the structures under study.
Yoshinori Tanaka - One of the best experts on this subject based on the ideXlab platform.
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dynamic control of the Q Factor in a photonic crystal nanocavity
Nature Materials, 2007Co-Authors: Yoshinori Tanaka, Jeremy Upham, Takushi Nagashima, Tomoaki Sugiya, Takashi Asano, Susumu NodaAbstract:High-Quality (Q) Factor photonic-crystal nanocavities are currently the focus of much interest because they can strongly confine photons in a tiny space. Nanocavities with ultrahigh Q Factors of up to 2,000,000 and modal volumes of a cubic wavelength have been realized. If the Q Factor could be dynamically controlled within the lifetime of a photon, significant advances would be expected in areas of physics and engineering such as the slowing and/or stopping of light and Quantum-information processing. For these applications, the transfer, storage and exchange of photons in nanocavity systems on such a timescale are highly desirable. Here, we present the first demonstration of dynamic control of the Q Factor, by constructing a system composed of a nanocavity, a waveguide with nonlinear optical response and a photonic-crystal hetero-interface mirror. The Q Factor of the nanocavity was successfully changed from approximately 3,000 to approximately 12,000 within picoseconds.
Takashi Asano - One of the best experts on this subject based on the ideXlab platform.
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controlling the emission of Quantum dots embedded in photonic crystal nanocavity by manipulating Q Factor and detuning
Physical Review B, 2011Co-Authors: Tatsuya Nakamura, Takashi Asano, Kazunobu Kojima, T Kojima, Susumu NodaAbstract:We investigated the modulation of the Purcell effect by controlling the $Q$-Factor and detuning in a Quantum-dot--nanocavity coupled system. The $Q$-Factor and detuning are controlled independently using a nanocavity and a waveguide reflector formed in a two-dimensional photonic crystal (PC) slab, in combination with a newly developed nitrogen adsorption/desorption method that enables local control of the refractive index. For example, we observed that the emission of a Quantum dot via a cavity mode was increased by 3.3 times when the $Q$-Factor was changed from 3500 to 6900 while keeping the detuning fixed. The dependence of the Purcell effect on the $Q$-Factor has thus been directly observed.
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Increasing the Q Factor and controlling the resonant wavelength of photonic crystal nanocavities
2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference, 2009Co-Authors: Yasushi Takahashi, Tomoaki Sugiya, Takashi Asano, Shota Yamada, Yuki Taguchi, Susumu NodaAbstract:We have succeeded in developing a nanocavity with Q Factor over 3 million and arrayed nanocavities in which the variation of resonant wavelengths has a standard deviation as small as ~0.28 nm.
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dynamic control of the Q Factor in a photonic crystal nanocavity
Nature Materials, 2007Co-Authors: Yoshinori Tanaka, Jeremy Upham, Takushi Nagashima, Tomoaki Sugiya, Takashi Asano, Susumu NodaAbstract:High-Quality (Q) Factor photonic-crystal nanocavities are currently the focus of much interest because they can strongly confine photons in a tiny space. Nanocavities with ultrahigh Q Factors of up to 2,000,000 and modal volumes of a cubic wavelength have been realized. If the Q Factor could be dynamically controlled within the lifetime of a photon, significant advances would be expected in areas of physics and engineering such as the slowing and/or stopping of light and Quantum-information processing. For these applications, the transfer, storage and exchange of photons in nanocavity systems on such a timescale are highly desirable. Here, we present the first demonstration of dynamic control of the Q Factor, by constructing a system composed of a nanocavity, a waveguide with nonlinear optical response and a photonic-crystal hetero-interface mirror. The Q Factor of the nanocavity was successfully changed from approximately 3,000 to approximately 12,000 within picoseconds.
Daquan Yang - One of the best experts on this subject based on the ideXlab platform.
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ultracompact on chip multiplexed sensor array based on dense integration of flexible 1 d photonic crystal nanobeam cavity with large free spectral range and high Q Factor
IEEE Photonics Journal, 2017Co-Authors: Daquan Yang, Bo Wang, Xin Chen, Chuan WangAbstract:A method for the dense integration of one-dimensional (1-D) photonic crystal nanobeam cavity (PCNC) based integrated sensor array (1-D-PCNC-ISA) is proposed. The 1-D-PCNC-ISA consists of multiple parallel-connected sensing channels with airgap separations. On each channel, only a single flexible 1-D-PCNC sensor with large free spectral range (FSR) and high Q-Factor is contained. With proper engineering of the FSR, multiple ultracompact high-sensitivity 1-D-PCNC sensors can be integrated into microarrays without resonance overlap, and be interrogated simultaneously between a single input/output ports. Using 3-D finite-difference-time-domain (3-D-FDTD) method, the performance of the device is investigated theoretically in the whole paper. With optimization design, a large FSR as wide as 197 nm and high Q-Factor 2 x 10 5 can be achieved. Moreover, the refractive index sensitivities of a 5-channel 1-D-PCNC-ISA as high as 170.6, 152.7, 138.5, 128.1, and 120.5 nm/RIU are obtained. Particularly, the footprint of a 5-channel 1-D-PCNC-ISA is ~7μm x 65μm (width by length), which is decreased by three orders of magnitude compared to the sensor arrays based on 2-D-PC cavity platforms. To the best of our knowledge, this is for the first time that a 1-D-PCNC based multichannel parallel-connected sensor array has been displayed with channel spacing as small as 0.195μm, extinction ratio > 20 dB and Q-Factor > 10 5 , respectively, without using particular materials or complexities in fabrication. Both the specific result and the general idea are promising in future ultracompact lab-on-a-chip applications and nanophotonic integrations.
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high sensitivity and high Q Factor nanoslotted parallel Quadrabeam photonic crystal cavity for real time and label free sensing
Applied Physics Letters, 2014Co-Authors: Daquan Yang, Shota Kita, Feng Liang, Cheng Wang, Huiping Tian, Yuefeng Ji, Marko Loncar, Qimin QuanAbstract:We experimentally demonstrate a label-free sensor based on nanoslotted parallel Quadrabeam photonic crystal cavity (NPQC). The NPQC possesses both high sensitivity and high Q-Factor. We achieved sensitivity (S) of 451 nm/refractive index unit and Q-Factor >7000 in water at telecom wavelength range, featuring a sensor figure of merit >2000, an order of magnitude improvement over the previous photonic crystal sensors. In addition, we measured the streptavidin-biotin binding affinity and detected 10 ag/mL concentrated streptavidin in the phosphate buffered saline solution.
