Ying Chen, Jie Wang, Tao Gao, Weilin Zhu, Xiangfeng Wang, Feng Huang. Fabrication of Large-Scale Free-Standing Terahertz Wire Grid Polarizer by Femtosecond Laser Micro-Machining[J]. Laser & Optoelectronics Progress, 2020, 57(11): 111424
- Laser & Optoelectronics Progress
- Vol. 57, Issue 11, 111424 (2020)
Fig. 1. Procedure of sample preparation
Fig. 2. Micrographs of samples. (a) Micrograph of sample 1 with discontinuous reinforced lines; (b) micrograph of sample 2 with continuous reinforced lines; (c) micrograph of commercial WGP. Insets in Figs. 2(a) and 2(b) show WGP designs
Fig. 3. Transmittance for different samples varying with angle θ between polarization direction of incident THz wave and line grating simulated by FDTD. (a) Without reinforced lines; (b) with discontinuous reinforced lines; (c) with continuous reinforced lines
Fig. 4. Measured THz spectra of samples at different θ. (a) Sample 1; (b) sample 3
Fig. 5. Simulated transmittance of samples at different θ. (a) Sample 1; (b) sample 3
Fig. 6. Degree of polarization (RDop) and extinction ratio (Rer) of samples 1 and 3. (a) Degree of polarization; (b) extinction ratio
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