Birefringent porous silicon membranes for optical sensing


In this work anisotropic porous silicon is investigated as a material for optical sensing. Birefringence and sensitivity of the anisotropic porous silicon membranes are thoroughly studied in the framework of Bruggeman model which is extended to incorporate the influence of environment effects, such as silicon oxidation. The membranes were also characterized optically demonstrating sensitivity as high as 1245 nm/RIU at 1500 nm. This experimental value only agrees with the theory when it takes into consideration the effect of silicon oxidation. Furthermore we demonstrate that oxidized porous silicon membranes have optical parameters with long term stability. Finally, we developed a new model to determine the contribution of the main depolarization sources to the overall depolarization process, and how it influences the measured spectra and the resolution of birefringence measurements.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: ©2011 Optical Society of America. This is an open access article under the OSA publishing terms:
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Publication ISSN: 1094-4087
Last Modified: 05 Feb 2024 08:35
Date Deposited: 18 Feb 2019 14:48
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... =oe-19-27-26106 (Publisher URL)
PURE Output Type: Article
Published Date: 2011-12-19
Authors: Álvarez, Jesús
Bettotti, Paolo
Suárez, Isaac
Kumar, Neeraj
Hill, Daniel (ORCID Profile 0000-0003-3510-7783)
Chirvony, Vladimir
Pavesi, Lorenzo
Martínez-Pastor, Juan



Version: Published Version

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