Polarization device employing the combination effect of double refraction and diffraction

Abstract

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Polarizing beamsplitter based on the effects of birefringent and resonance anomaly

“…Most PBSs employ the natural birefringent effect 1 ͑for example, Nicol prisms, Wollaston prisms, etc.͒, the diffraction effect 2,3 ͑grating structures͒, the absorption effect 1 ͑dichroic polarizer͒, the refraction effect 4 ͑multilayer structure, e.g., PBS cubes͒, or a combination of two or several of these effects. S. Liu et al proposed a new type of polarization device, 5,6 which combines the birefringent effect with the diffraction effect. This type of PBS is made of a sheet of birefringent material with a periodic structure of an echelon profile or a sawtooth profile on its surface.…”