Journal ArticleDOI
Active control of slow light on a chip with photonic crystal waveguides
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TLDR
An over 300-fold reduction of the group velocity on a silicon chip via an ultra-compact photonic integrated circuit using low-loss silicon photonic crystal waveguides that can support an optical mode with a submicrometre cross-section is experimentally demonstrated.Abstract:
It is known that light can be slowed down in dispersive materials near resonances. Dramatic reduction of the light group velocity-and even bringing light pulses to a complete halt-has been demonstrated recently in various atomic and solid state systems, where the material absorption is cancelled via quantum optical coherent effects. Exploitation of slow light phenomena has potential for applications ranging from all-optical storage to all-optical switching. Existing schemes, however, are restricted to the narrow frequency range of the material resonance, which limits the operation frequency, maximum data rate and storage capacity. Moreover, the implementation of external lasers, low pressures and/or low temperatures prevents miniaturization and hinders practical applications. Here we experimentally demonstrate an over 300-fold reduction of the group velocity on a silicon chip via an ultra-compact photonic integrated circuit using low-loss silicon photonic crystal waveguides that can support an optical mode with a submicrometre cross-section. In addition, we show fast (approximately 100 ns) and efficient (2 mW electric power) active control of the group velocity by localized heating of the photonic crystal waveguide with an integrated micro-heater.read more
Citations
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The role of input chirp on phase shifters based on slow and fast light effects in semiconductor optical amplifiers
TL;DR: It is shown that the enhancement of the phase shift due to optical filtering strongly depends on the chirp of the input optical signal.
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Slowdown of light due to exciton-polariton propagation in ZnO
TL;DR: By employing time-of-flight spectroscopy, the group velocity of light propagating through bulk ZnO is demonstrated to dramatically decrease down to 2044 km/s when photon energy approaches the absor...
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Multichannel SBS Slow Light Using Spectrally Sliced Incoherent Pumping
TL;DR: In this article, the authors proposed and experimentally demonstrated the use of an incoherent spectrally sliced amplified spontaneous emission (ASE) source as the pump for broadband stimulated Brillouin scattering-based slow light.
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Tuning of one-dimensional Si/SiO2 photonic crystals at the wavelength of 1.54 μm
TL;DR: In this paper, the authors simulate the tuning of reflectance of a one-dimensional photonic crystal (PC) by means of charge injection and show that sensitive tuning can be achieved for an impurity density ∼10 19 /cm 3 even for superlattices only a few periods long.
Journal ArticleDOI
Disorder-limited photon propagation and Anderson-localization in photonic crystal waveguides
TL;DR: In this paper, the authors investigated the disorder-limited propagation of photons in photonic crystal waveguides in the slow-light regime and deduced the propagation length to be less than 20μm for group index > 50.
References
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Journal ArticleDOI
Light speed reduction to 17 metres per second in an ultracold atomic gas
Lene Vestergaard Hau,Lene Vestergaard Hau,Stephen E. Harris,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Cyrus H. Behroozi +6 more
TL;DR: In this paper, an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than the speed of light in a vacuum, is presented.
Journal ArticleDOI
Block-iterative frequency-domain methods for Maxwell’s equations in a planewave basis
TL;DR: A fully-vectorial, three-dimensional algorithm to compute the definite-frequency eigenstates of Maxwell's equations in arbitrary periodic dielectric structures, including systems with anisotropy or magnetic materials, using preconditioned block-iterative eigensolvers in a planewave basis is described.
Journal ArticleDOI
Observation of coherent optical information storage in an atomic medium using halted light pulses
Chien Liu,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Lene Vestergaard Hau,Lene Vestergaard Hau +5 more
TL;DR: A theoretical model is presented that reveals that the system is self-adjusting to minimize dissipative loss during the ‘read’ and ‘write’ operations, anticipating applications of this phenomenon for quantum information processing.