Eur. Phys. J. AP 5, 45-50 (1999)
https://doi.org/10.1051/epjap:1999110

Sculptured thin film Šolc filters for optical sensing of gas concentration

Computational & Theoretical Materials Sciences Group (CATMAS), Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802–1401, USA

Received: 29 May 1998
Accepted: 24 August 1998
Published online: 15 January 1999

Abstract

The viability of sculptured thin film (STF) implementations of Šolc 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 Šolc 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.