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Proceedings Paper

Space-variant polarization manipulation of a thermal emission by a polar material subwavelength grating supporting surface phonon-polaritons
Author(s): Erez Hasman; Nir Dahan; Avi Niv; Gabriel Biener; Vladimir Kleiner
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Paper Abstract

Space-variant polarization manipulation of enhanced omnidirectional thermal emission in a narrow spectral peak is presented. The emission is attributed to surface phonon-polariton excitation from space-variant subwavelength SiO2 gratings. Polarization manipulation was obtained by discretely controlling the local orientation of the grating. We experimentally demonstrated thermal emission in an axially symmetric polarization distribution. We show that by coupling surface phonon-polaritons to a propagating field, large anisotropy of the emissivity is obtained within a narrow spectral range. We experimentally demonstrate this effect by fabricating a space-variant subwavelength grating on a SiO2 substrate to encrypt an image in the polarization state of a thermal radiation field. Theoretical calculations based on rigorous coupled-wave analysis are presented along with experimental results.

Paper Details

Date Published: 9 February 2006
PDF: 6 pages
Proc. SPIE 6131, Nanomanipulation with Light II, 61310L (9 February 2006); doi: 10.1117/12.642884
Show Author Affiliations
Erez Hasman, Technion-Israel Institute of Technology (Israel)
Nir Dahan, Technion-Israel Institute of Technology (Israel)
Avi Niv, Technion-Israel Institute of Technology (Israel)
Gabriel Biener, Technion-Israel Institute of Technology (Israel)
Vladimir Kleiner, Technion-Israel Institute of Technology (Israel)

Published in SPIE Proceedings Vol. 6131:
Nanomanipulation with Light II
David L. Andrews, Editor(s)

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