Space-variant polarization manipulation of a thermal emission by a polar material subwavelength grating supporting surface phonon-polaritons

Erez Hasman; Nir Dahan; Avi Niv; Gabriel Biener; Vladimir Kleiner

doi:10.1117/12.642884

9 February 2006 Space-variant polarization manipulation of a thermal emission by a polar material subwavelength grating supporting surface phonon-polaritons

Erez Hasman, Nir Dahan, Avi Niv, Gabriel Biener, Vladimir Kleiner

Author Affiliations +

Proceedings Volume 6131, Nanomanipulation with Light II; 61310L (2006) https://doi.org/10.1117/12.642884
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

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.

Citation Download Citation

Erez Hasman, Nir Dahan, Avi Niv, Gabriel Biener, and Vladimir Kleiner "Space-variant polarization manipulation of a thermal emission by a polar material subwavelength grating supporting surface phonon-polaritons", Proc. SPIE 6131, Nanomanipulation with Light II, 61310L (9 February 2006); https://doi.org/10.1117/12.642884

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