Large Frequency Range of Photonic Band Gaps on Porous Silicon Heterostructures for Infrared Applications

Details Large Frequency Range of Photonic Band Gaps on Porous Silicon Heterostructures for Infrared Applications Large Frequency Range of Photonic Band Gaps on Porous Silicon Heterostructures for Infrared Applications

2010-12-29

arxiv.org/abs/1012.5984v1

Physics

Optics

Scientific paper

In this work we show theoretically that it is possible to design a large band gap in the infrared range using a one-dimensional Photonic Crystal heterostructure made of porous silicon. Stacking together multiple photonic crystal substructures of the same contrast index, but of different lattice periods, it is possible to broad the narrow forbidden band gap that can be reached by the low contrast index of the porous silicon multilayers. The main idea in this work is that we can construct a Giant Photonic Band Gap -as large as desired- by combining a tandem of photonic crystals substructures by using a simple analytical rule to determine the period of each substructure.

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