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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
Published on: July 18, 2015
Holistic characterization of complex transmittances generated by infrared sub-wavelength gratings
Bruno Toulon1, Grégory Vincent, Riad Haidar
1ONERA, The French Aerospace Lab, Chemin de la Hunière, F-91761 Palaiseau Cedex, France.
Abstract:
We present a characterization technique of wide-area subwavelength structures. The optical bench is based on lateral shearing interferometry, which allows an accurate complex transmittance (phase and amplitude) measurement. The experimental validation is made in the long-wavelength infrared domain; more precisely we work in the integrated 8-9 microm spectral range. Measurements of the transmitted amplitude and phase shift reveal a good agreement with respectively experimental results based on Fourier Transform infrared spectrometry, and theoretical simulations.
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