Infrared and Laser Engineering, Volume. 48, Issue 5, 520003(2019)
Broadband terahertz polarization beam splitter based on subwavelength grating sandwiched between silica layers
A broadband terahertz (THz) polarization beam splitter (PBS) was proposed. The PBS was based on subwavelength grating sandwiched between silica layers, which could split an arbitrarily polarized optical beam into two orthogonal, linearly polarized components, and then reflected the TE mode and transmit the TM mode. It was shown that THz PBS could efficiently operate from 3.5 THz to 5.5 THz, with high diffraction efficiencies and extinction ratios. In the process of PBS manufacture, there would be unavoidable deviations of the geometric parameters, which may affect its properties, i.e. the diffraction efficiencies and extinction ratios. Therefore, some structure parameters were calculated. Those values suggested that the designed PBS allows sufficient manufacture tolerances. When D1 ranged from 1 μm to 1.2 μm and thickness D3 ranged from 2.8 μm to 3 μm, the values of
Get Citation
Copy Citation Text
Zhang Yelan, Zhang Kun, Kong Weijin, Li Caiyu, Xia Feng, Yun Maojin. Broadband terahertz polarization beam splitter based on subwavelength grating sandwiched between silica layers[J]. Infrared and Laser Engineering, 2019, 48(5): 520003
Received: Dec. 7, 2018
Accepted: Jan. 13, 2019
Published Online: Jun. 22, 2019
The Author Email: Yelan Zhang (726487797@qq.com)