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Proceedings Paper

Tunable mid-infrared filter based on the superposition of subwavelength gratings
Author(s): T. Estruch; J. Jaeck; S. Derelle; F. Pardo; R. Haïdar; J. Primot
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Paper Abstract

In 2010, the existence of a zero of transmission at high wavelengths different from the Rayleigh Wood anomaly was highlighted when two identical subwavelength gratings are brought close enough. We recently revealed the origin of this transmission extinction and the mechanism is recalled here. Furthermore, we present an experimental setup to measure the amplitude of this extinction and study its spectral behavior when changing geometrical parameters which represent a real technological challenge. This way a new generation of tunable filters in the mid-infrared with perfect spectral shape control and high rejection efficiency can be designed with practical use to gas sensing applications.

Paper Details

Date Published: 1 May 2012
PDF: 7 pages
Proc. SPIE 8424, Nanophotonics IV, 84242O (1 May 2012); doi: 10.1117/12.922369
Show Author Affiliations
T. Estruch, ONERA - The French Aerospace Lab. (France)
J. Jaeck, ONERA - The French Aerospace Lab. (France)
S. Derelle, ONERA - The French Aerospace Lab. (France)
F. Pardo, Lab. de Photonique et Nanostructures, CNRS (France)
R. Haïdar, ONERA - The French Aerospace Lab. (France)
J. Primot, ONERA - The French Aerospace Lab. (France)

Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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