Theoretical and experimental study of infrared reflection transmission and thermal emission from lamellar grating

Nathan Pinhas; Mark Auselender; Shlomo Hava; Ari Cohen-Nov

doi:10.1117/12.527946

9 July 2004 Theoretical and experimental study of infrared reflection transmission and thermal emission from lamellar grating

Nathan Pinhas, Mark Auselender, Shlomo Hava, Ari Cohen-Nov

Author Affiliations +

Proceedings Volume 5360, Photonic Crystal Materials and Devices II; (2004) https://doi.org/10.1117/12.527946
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

Infrared spectral transmission, reflection and thermal emission from diffraction gratings with differing periods, groove widths and groove depths were experimentally and theoretically studied. The structural dimensions are comparable to the measured spectral wavelengths in the range 2.5 to 25 microns. For calculating the optical properties (transmission and reflection spectra), we have used an in-house S-Matrix Propagation Algorithm (SMPA) technique which is unconditionally stable versus changes in structural dimensions, optical constants and truncation order. We have experimentally studied the planar angular transmission and reflection spectrum of Si and GaAs grating samples, using FTIR spectrometry over the spectral range from 2.5 μm to 25 μm. At λ < Λ, the transmitted intensity is quasi-periodic with respect to wave number. A similar property also appears in the reflection spectra. The theoretical results for spectral transmission are in good agreement with the experimental results for the wavelength range 2.5 to 25 μm.

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Nathan Pinhas, Mark Auselender, Shlomo Hava, and Ari Cohen-Nov "Theoretical and experimental study of infrared reflection transmission and thermal emission from lamellar grating", Proc. SPIE 5360, Photonic Crystal Materials and Devices II, (9 July 2004); https://doi.org/10.1117/12.527946

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