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Opt Lett. 1983 Sep 1;8(9):491-3.

Maximum statistical increase of optical absorption in textured semiconductor films.

Abstract

Complete statistical randomization of the direction of propagation of light trapped in semiconductor films can result in a large absorption enhancement. We have employed a calorimetric technique, photothermal deflection spectroscopy, to monitor the absorption of alpha-SiH(x) films textured by the natural lithography process. The observed enhancement factors, as high as 11.5, are consistent with full internal phase-space randomization of the incoming light.

PMID:
19718158
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