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arXiv · 1311.5876

Absorption control in pseudodisordered photonic-crystal thin film

Romain Peretti·Guillaume Gomard·Loïc Lalouat·Christian Seassal·Emmanuel Drouard
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Abstract

The positive effects of various perturbations introduced in a bidimensional photonic-crystal patterned membrane on its integrated absorption are investigated numerically and theoretically. Two phenomena responsible for the enhanced absorption observed are identified: an increase of the spectral density of modes, obtained thanks to folding mechanisms in the reciprocal lattice, and a better coupling of the modes with the incident light. By introducing a proper pseudodisordered pattern, we show that those two effects can be exploited so as to overcome the integrated absorption obtained for an optimized and single pattern unit cell photonic crystal.

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Romain Peretti, Guillaume Gomard, Loïc Lalouat, Christian Seassal, Emmanuel Drouard. 2013-11-22. Absorption control in pseudodisordered photonic-crystal thin film. https://doi.org/10.1103/physreva.88.053835

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