Disordered Optical Modes for Photon Management

Details Disordered Optical Modes for Photon Management Disordered Optical Modes for Photon Management

2012-02-21

arxiv.org/abs/1202.4601v1

Physics

Optics

Scientific paper

Wave transport in disordered systems is a vast research topic, ranging from electrons in semiconductors, to light in random dielectrics, to cold atoms in laser speckles. In optics, light transport is conveyed by random electromagnetic modes and the wave can be localized about a point or extended throughout the system, depending on disorder strength, structural correlations and dimensionality of the system. Light localization phenomena are more dominantly present in two-dimensional systems than in three-dimensional ones and their optical modes can be tailored to a greater extent. Here, we show that it is possible to make use of the properties of lower-dimensional disordered structures to obtain photon management in three-dimensional space. More particularly, we argue that two-dimensional disorder and wave interferences can be exploited to improve the performance of light absorbers or emitters. Our findings have direct applications for enhancing the absorption efficiency of third-generation solar cells in a relatively simple and easy-to-implement way and provide unique opportunities for high extraction efficiency light-emitting diodes.

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