Chinese Optics Letters, 2019, 17 (5): 052303, Published Online: May. 13, 2019
Multichannel high extinction ratio polarized beam splitters based on metasurfaces Download: 1087次
230.1360 Beam splitters 240.6680 Surface plasmons 230.1950 Diffraction gratings 060.4230 Multiplexing
Abstract
Separating lights into different paths according to the polarization states while keeping their respective path’s polarizations with high purification is keen for polarization multiplex in optical communications. Metallic nanowire gratings with multi-slits in a period are proposed to achieve polarized beam splitters (PBSs) in reflection and diffraction. The setting of multi-slits largely reduces the reflection of photons with a transverse magnetific field via the plasmonic waveguiding effect, which leads to highly polarized output lights with extinction ratio larger than 20 dB in each channel. The proposed reflection/diffraction PBSs enrich the approaches to control the polarization states with the advantages of wide incident angles and flexible beam splitting angles.
Haoyu Wang, Jun Zheng, Yifei Fu, Chengliang Wang, Xinran Huang, Zhicheng Ye, Liejia Qian. Multichannel high extinction ratio polarized beam splitters based on metasurfaces[J]. Chinese Optics Letters, 2019, 17(5): 052303.