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Photonic bandgap effect in Periodic Porous Silicon Planar Waveguides

Published online by Cambridge University Press:  17 March 2011

P. Ferrand  and
R. Romestain
P. Ferrand
Affiliation:
Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble 1, CNRS UMR 5588, BP 87, F-38402 Saint Martin d'Hères, France
R. Romestain
Affiliation:
Laboratoire de Spectrométrie Physique, Université Joseph Fourier Grenoble 1, CNRS UMR 5588, BP 87, F-38402 Saint Martin d'Hères, France
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Abstract

We have obtained a porous silicon optical planar waveguide, with a submicronic periodic modulation of the optical index along one direction of plane, using a holographic process. Near-infrared continuous transmission spectra of guided light across not less than 3000 periods show several strong stopbands, with a decrease of intensity by two orders of magnitude. By means of the coupled-mode theory, we were able to deduce from the spectra a realistic map of the optical index at a microscopic scale, demonstrating a strong photo-induced index contrast (Δn = 0.5) at a submicronic scale.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 638: Symposium F – Microcrystaline & Nanocrystalline Semiconductors-2000 , 2000 , F4.4.1
Copyright
Copyright © Materials Research Society 2001

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