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Proceedings Paper

Real-time tailoring of the spectral shape of infrared transmission filters using anti-resonant anomalies
Author(s): Thomas Estruch; Julien Jaeck; Benjamin Portier; Sophie Derelle; Fabrice Pardo; Grégory Vincent; Jean-Luc Pelouard; Jérôme Primot; Riad Haidar
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Paper Abstract

The multispectral imaging technique consists of imaging a given scene at various wavelengths of interest, each one containing a different spectral information. By analyzing this spectral content, the chemical species that are present can be localized on the image and identified by reconstructing their spectral signature. In this way, following Ebbesen's seminal work in plasmonics [1], purely metallic or hybrid metallodielectric structures [2, 3] seem to be ideal candidates to perform spectral filtering due to their extraordinary transmission efficiency [4] and polarization selectivity. Moreover, their compact feature makes it possible for them to gather in wide arrays of filters that, once integrated into a cooled infrared camera, can achieve real-time multispectral imaging [5]. As seen in Figure 1.d. the spectral signature reconstruction of a chemical species strongly depends on the number of filters and their transmission spectra for the designed matrix. In order to improve the multispectral camera, a complementary approach consists of changing the filter design to realize a tunable filter whose spectral shape can be adjusted in real time according to the imaged scene. We focused our attention on the superposition of subwavelength gratings which seems to be a structure of great potential for multispectral imaging applications [6, 7].

Paper Details

Date Published: 21 February 2013
PDF: 10 pages
Proc. SPIE 8632, Photonic and Phononic Properties of Engineered Nanostructures III, 863208 (21 February 2013); doi: 10.1117/12.2003572
Show Author Affiliations
Thomas Estruch, ONERA - The French Aerospace Lab (France)
Julien Jaeck, ONERA - The French Aerospace Lab (France)
Benjamin Portier, ONERA - The French Aerospace Lab (France)
Sophie Derelle, ONERA - The French Aerospace Lab (France)
Fabrice Pardo, Lab. de Photonique et de Nanostructures, CNRS (France)
Grégory Vincent, ONERA - The French Aerospace Lab (France)
Jean-Luc Pelouard, Lab. de Photonique et de Nanostructures, CNRS (France)
Jérôme Primot, ONERA - The French Aerospace Lab (France)
Riad Haidar, ONERA - The French Aerospace Lab (France)


Published in SPIE Proceedings Vol. 8632:
Photonic and Phononic Properties of Engineered Nanostructures III
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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