Coherent perfect absorption and reflection in slow-light waveguides
Optics
2018-04-13 v1
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.
Cite
@article{arxiv.1309.3627,
title = {Coherent perfect absorption and reflection in slow-light waveguides},
author = {Nadav Gutman and C. Martijn de Sterke and Andrey A. Sukhorukov and Y. D. Chong},
journal= {arXiv preprint arXiv:1309.3627},
year = {2018}
}