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arXiv · 1309.3627

Coherent perfect absorption and reflection in slow-light waveguides

Nadav Gutman·C. Martijn de Sterke·Andrey A. Sukhorukov·Y. D. Chong
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Abstract

We identify a family of unusual slow-light modes occurring in lossy multi-mode grating waveguides, for which either the forward or backward mode components, or both, become degenerate. In the fully-degenerate case, by varying the wave amplitudes in a uniform input waveguide, one can modulate between coherent perfect absorption (zero reflection) and perfect reflection. The perfectly-absorbed wave has anomalously short absorption length, scaling as the inverse 1/3 power of the absorptivity.

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Nadav Gutman, C. Martijn de Sterke, Andrey A. Sukhorukov, Y. D. Chong. 2013-09-14. Coherent perfect absorption and reflection in slow-light waveguides. https://doi.org/10.1364/ol.38.004970

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