A multi-channel polarized thermal emitter (PTE) is presented. The multi-channelPTE can emit polarized thermal radiation without using a polarizer at normal emergence. The multi-channel PTE consists of two layers of metallic gratings on a monolithic and homogeneous metallic plate. It can be fabricated by a low-cost soft lithography technique called two-polymer microtransfer molding. The spectral positions of the mid-infrared (MIR) radiation peaks can be tuned by changing the periodicity of the gratings and the spectral separation between peaks are tuned by changing the mutual angle between the orientations of the two gratings.
US 8,487,283 B1
Iowa State University Research Foundation, Inc.
Lee, Jae-Hwang; Ho, Kai-Ming; and Constant, Kristen P., "Multi-channel polarized thermal emitter" (2013). Iowa State University Patents. 276.