Nouveaux concepts de filtres spectraux ultra-sélectifs pour spectroscopie embarquée

Ksenia Sharshavina 1
1 LAAS-PHOTO - Équipe Photonique
LAAS - Laboratoire d'analyse et d'architecture des systèmes [Toulouse]
Abstract : Guided Mode Resonance Filters ( GMRF ) are a new generation of narrowband optical filters and are a very promising alternative to conventional multilayer Fabry-Perot filters. The resonance peak of GMRF can be spectrally extremely thin and with a centering wavelength tunable according to the angle of incidence of the light. These properties are particularly important for spectroscopy. Previous works have helped to implement an original structure with two 1D crossed gratings. The performance of this filter overpasses those of conventional filters in their spectral subnanometric response, tunability and their ability to overcome the influence of the polarization of the incident wave under oblique incidence. The aim of this work is to explore the final performances of such devices in terms of resolution and rejection rate, thanks to an approach combining theory, fabrication technology and characterization. We present experimental results of a polarization independent reflective filter, tunable over 40nm with a tunability of 8.3nm / °, having a reflection of 10-3 on a 90nm range outside the resonance and a quality factor over 5000.
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Optique / photonique. Université Paul Sabatier - Toulouse III, 2016. Français. 〈NNT : 2016TOU30264〉
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Ksenia Sharshavina. Nouveaux concepts de filtres spectraux ultra-sélectifs pour spectroscopie embarquée. Optique / photonique. Université Paul Sabatier - Toulouse III, 2016. Français. 〈NNT : 2016TOU30264〉. 〈tel-01451002v2〉

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