Holistic characterization of complex transmittances generated by infrared sub-wavelength gratings.
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.
ONERA, The French Aerospace Lab, Chemin de la Hunière, F-91761 Palaiseau Cedex, France.
Bruno
B
Toulon
Grégory
G
Vincent
Riad
R
Haidar
Nicolas
N
Guérineau
Stéphane
S
Collin
Jean-Luc
JL
Pelouard
Jérôme
J
Primot
D002138:Calibration; D004867:Equipment Design; D006046:Gold; D007368:Interferometry / Q000379:methods*; D008027:Light; D015233:Models, Statistical; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry*; D055095:Optics and Photonics; D013055:Spectrophotometry, Infrared / Q000379:methods; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*
D006046:Gold