Abstract

Space-variant partially polarized thermal emission is investigated. 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 $\mathrm{Si}{\mathrm{O}}_2$ substrate to encrypt an image in the polarization state of a thermal radiation field.

© 2005 Optical Society of America

Geometrical phase image encryption obtained with space-variant subwavelength gratings

Gabriel Biener, Avi Niv, Vladimir Kleiner, and Erez Hasman
Opt. Lett. 30(10) 1096-1098 (2005)

Rotating vectorial vortices produced by space-variant subwavelength gratings

Avi Niv, Gabriel Biener, Vladimir Kleiner, and Erez Hasman
Opt. Lett. 30(21) 2933-2935 (2005)

Space-variant polarization manipulation for far-field polarimetry by use of subwavelength dielectric gratings

Yuri Gorodetski, Gabriel Biener, Avi Niv, Vladimir Kleiner, and Erez Hasman
Opt. Lett. 30(17) 2245-2247 (2005)

Near-infrared demonstration of computer-generated holograms implemented by using subwavelength gratings with space-variant orientation

Uriel Levy, Hyo-Chang Kim, Chia-Ho Tsai, and Yeshaiahu Fainman
Opt. Lett. 30(16) 2089-2091 (2005)

Computer-generated infrared depolarizer using space-variant subwavelength dielectric gratings

Gabriel Biener, Avi Niv, Vladimir Kleiner, and Erez Hasman
Opt. Lett. 28(16) 1400-1402 (2003)