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Issue		Eur. Phys. J. Appl. Phys. Volume 5, Number 1, January 1999
Page(s)		45 - 50
DOI		10.1051/epjap:1999110

DOI: 10.1051/epjap:1999110

Eur. Phys. J. AP 5, 45-50

Sculptured thin film Solc filters for optical sensing of gas concentration

E. Ertekin - A. Lakhtakia

Computational & Theoretical Materials Sciences Group (CATMAS), Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802-1401, USA
AXL4@psu.edu

Received: 29 May 1998 / Accepted: 24 August 1998

Abstract
The viability of sculptured thin film (STF) implementations of Solc fan and folded filters for optical detection and determination of gas concentration is established. A nanoscopic-to-continuum model is devised for predicting the electromagnetic (optical) response of a STF Solc filter whose void regions are filled with a chemically non-reacting gas. Ultra-narrow band-pass features in the transmission spectrum are shown to shift with the gas concentration.

PACS
42.25.Lc Birefringence - 42.79.Yd Other optical elements, devices, and systems - 81.05.Zx New materials: theory, design, and fabrication

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