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2 February 2009 Light trapping with a few cavities
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We describe a dynamically-tuned system capable of capturing light pulses incident from a waveguide in a pair of microcavities. We use coupled mode theory to design a method for determining how to tune the microcavity resonant frequencies. The results show that pulses can be captured almost completely, with arbitrarily small reflected power. We optimize the pulse capture bandwidth by varying the cavity coupling constants and show that the maximum bandwidth is comparable to the resonant-frequency tuning range. We demonstrate near complete pulse capture in FDTD simulations of a two cavity 2D photonic crystal implementation of the system. Current technology would allow for capture of pulses with widths as low as ~100ps, with a holding time limited only by cavity loss rates.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Clayton R. Otey, Michelle L. Povinelli, and Shanhui Fan "Light trapping with a few cavities", Proc. SPIE 7226, Advances in Slow and Fast Light II, 72260Q (2 February 2009);

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