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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Accurate Chromatic Dispersion Characterization of Photonic Integrated Circuits
TL;DR: In this article, an accurate technique to characterize chromatic dispersion and its slope versus wavelength is reported, based on a heterodyne Mach-Zehnder interferometer which is immune to thermal phase noise by using a counterpropagating reference beam.
Journal ArticleDOI
Adiabatic bends in surface plasmon polariton band gap structures.
TL;DR: The SPP propagation along a 30 degrees bent channel obtained by an adiabatic rotation of the periodic array of scatterers is demonstrated and numerical simulations using the Lippmann-Schwinger integral equation method are presented and found in reasonable agreement with the experimental results.
Journal ArticleDOI
Slow light with large group index – bandwidth product in lattice-shifted photonic crystal waveguides
TL;DR: In this paper, the authors presented a systematic optimization procedure to generate slow light with large group index, wideband, and low dispersion in an lattice-shifted photonic crystal waveguide.
Journal ArticleDOI
Influence of Disorder and Finite-Size Effects on Slow Light Transport in Extended Photonic Crystal Coupled-Cavity Waveguides
Mohamed Sabry Mohamed,Yiming Lai,Yiming Lai,Momchil Minkov,Vincenzo Savona,Antonio Badolato,Antonio Badolato,Romuald Houdré +7 more
TL;DR: In this paper, a set of coupled microcavities in a photonic crystal lattice is used to slow down light in integrated optical circuits, which is a convenient approach for slowing down light.
Journal ArticleDOI
Reconfigurable slow light in phase change photonic crystal waveguide
Rongzi Wang,Tun Cao +1 more
TL;DR: In this article, a reconfigurable slow light device using a PCW based on a prototypical chalcogenide glass, Ge2Sb2Te5 (GST225), was proposed.
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.