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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Journal ArticleDOI
Novel slow light waveguide with controllable delay-bandwidth product and utra-low dispersion
Ran Hao,Eric Cassan,Hamza Kurt,Xavier Le Roux,Delphine Marris-Morini,Laurent Vivien,Huaming Wu,Zhiping Zhou,Xinliang Zhang +8 more
TL;DR: A novel type of slow light photonic crystal waveguide which can produce unusual "U" type group index - frequency curves with constant group index n(g) over large bandwidth is demonstrated.
Journal ArticleDOI
Slow-light-enhanced gain in active photonic crystal waveguides.
TL;DR: By solely changing the photonic crystal structural parameters, the maximum value of the gain coefficient can be increased compared with a ridge waveguide structure and at the same time the spectral position of the peak gain be controlled.
Journal ArticleDOI
An ultra-compact all optical full adder based on nonlinear photonic crystal resonant cavities
TL;DR: In this paper, the authors proposed and designed an all optical full adder based on photonic crystal, which used four nonlinear resonant cavities inside a two-dimensional photonic lattice.
Journal ArticleDOI
Integrated NiSi waveguide heaters for CMOS-compatible silicon thermo-optic devices
TL;DR: Simulations suggest that a further reduction in the power consumption P(pi) is feasible, and NiSi-based heaters integrated with submicrometer silicon waveguides integrated with CMOS-compatible drive voltages are reported.
Journal ArticleDOI
Coupled-resonator-induced reflection in photonic-crystal waveguide structures
TL;DR: A novel effect of the coupled-resonator-induced reflection (CRIR) characterized by a very high and easily tunable quality factor of the reflection line, for the case of the inter-site coupling between the cavities and the waveguide.
References
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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.
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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.