Broadband and polarization-insensitive subwavelength grating reflector for the near-infrared region

• 作 者: 张瑞 王宇飞 张治金 冯志刚 祁帆 刘磊 郑婉华
• 机 构: State key Laboratory on Integrated Optoelectronics,Institute of Semiconductors,Chinese Academy of Sc
• 出 处: Chinese Optics Letters
• 发表日期: 2014年02期
• 关键词: reflector grating insensitive overlapped reflectivity bandwidth multilayer broad

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.

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 polarizations, which is much higher than the previously reported results We believe this subwavelength grating reflector can be applied to unpolarized devices.