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«Holographie grating in Porous Silicon»

Published online by Cambridge University Press:  15 February 2011

G. Lérondel
Affiliation:
Laboratoire de Spectrométrie Physique, Université J. Fourier - CNRS (UMR 5588), B. p. 87, 38402 St. Martin d'Hères cedex, France, lerondel@spectro.grenet.fr
M. Thönissen
Affiliation:
Institut für Schicht-Ionentechnik (ISI), KFA Jiilich, 52425 Jülich, Germany
S. Setzu
Affiliation:
Laboratoire de Spectrométrie Physique, Université J. Fourier - CNRS (UMR 5588), B. p. 87, 38402 St. Martin d'Hères cedex, France, lerondel@spectro.grenet.fr
R. Romestain
Affiliation:
Laboratoire de Spectrométrie Physique, Université J. Fourier - CNRS (UMR 5588), B. p. 87, 38402 St. Martin d'Hères cedex, France, lerondel@spectro.grenet.fr
J. C. Vial
Affiliation:
Laboratoire de Spectrométrie Physique, Université J. Fourier - CNRS (UMR 5588), B. p. 87, 38402 St. Martin d'Hères cedex, France, lerondel@spectro.grenet.fr
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Abstract

We have produced lateral porosity modulation in porous silicon layers on a micron scale. Using the photosensitivity of the etching process and optical interferences, stripes are formed periodically on the top but also in the depth of the layer depending on the illumination wavelength. The periodicity of the structure is easily modified by changing the wavelength or the incident angles of the two laser beams used to create the modulated illumination. By rotating the sample, two dimensional structures have also been obtained. The samples formed by this procedure are characterised by light diffraction and photoluminescence both of which show the alternance of high and low porosity ranges. With this kind of in-depth lithography, easy and very cheap fabrication of porous silicon gratings promises a large potential range of applications of this material to integrated optics and photonics.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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References

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