Chinese Optics Letters, 2014, 12 (2): 020502, Published Online: Jan. 26, 2014
Broadband and polarization-insensitive subwavelength grating reflector for the near-infrared region 
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050.1950 Diffraction gratings 050.5080 Phase shift 050.6624 Subwavelength structures 230.4170 Multilayers
Abstract
We propose a polarization-insensitive and broadband subwavelength grating reflector based on a multilayer structure. The reflector has an overlapped high reflectivity (>99.5%) bandwidth of 248 nm between the TE and the TM polarizations, which is much higher than the previously reported results. We believe this subwavelength grating reflector can be applied to unpolarized devices.
Rui Zhang, Yufei Wang, Yejin Zhang, Zhigang Feng, Fan Qi, Lei Liu, Wanhua Zheng. Broadband and polarization-insensitive subwavelength grating reflector for the near-infrared region[J]. Chinese Optics Letters, 2014, 12(2): 020502.
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