Angular-dependent polarization-insensitive filter fashioned with zero-contrast grating

作者：Gao Xumin; Wu Tong; Xu Yin; Li Xin; Bai Dan; Zhu Gangyi; Zhu Hongbo; Wang Yongjin^*

来源：Optics Express, 2015, 23(12): 15235-15241.

DOI：10.1364/OE.23.015235

We report here an angular-dependent polarization-insensitive filter fashioned with a free-standing zero-contrast grating (ZCG), which is implemented on an HfO2/Silicon platform. The spectral characteristics are investigated by rigorous coupled-wave analysis method and measured on angular-resolved micro-reflectance system. The proposed ZCG structure experimentally shows that the polarization-insensitive resonances occur at 595nm for the incidence angle theta of 12.8 degrees and 500nm for the incidence angle. of 14.2 degrees. When the incident light is normal to the grating surface, the ZCG device generates yellow and red colors for p- and s-polarization, respectively. The experimental results are in good agreement with the simulations, which indicate that the free-standing ZCG device is promising for polarization-insensitive filter and polarization-controlled tunable color filter.

• 出版日期2015-6-15
• 单位南京邮电大学