Thermal image encryption obtained with a SiO2 space-variant subwavelength grating supporting surface phonon-polaritons

被引：14

作者：

Dahan, N ^{[1
]}

Niv, A ^{[1
]}

Biener, G ^{[1
]}

Kleiner, V ^{[1
]}

Hasman, E ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Mech Engn, Opt Engn Lab, IL-32000 Haifa, Israel

来源：

OPTICS LETTERS | 2005年 / 30卷 / 23期

关键词：

D O I：

10.1364/OL.30.003195

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 SiO2 substrate to encrypt an image in the polarization state of a thermal radiation field. (c) 2005 Optical Society of America.

引用

页码：3195 / 3197

页数：3

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