太赫兹辐射
偏振器
光学
栅栏
分束器
宽带
极化(电化学)
光电子学
材料科学
完美导体
严格耦合波分析
物理
衍射光栅
双折射
散射
激光器
化学
物理化学
作者
Zefan Lin,Bo Wang,Chen Fu
出处
期刊:Physica Scripta
[IOP Publishing]
日期:2021-12-01
卷期号:96 (12): 125540-125540
被引量:8
标识
DOI:10.1088/1402-4896/ac4549
摘要
Abstract A novel wideband terahertz polarization beam splitter with special diffraction orders working at terahertz band is described in this paper. The polarizer can achieve high diffraction efficiency and uniformity in the 2.50–2.56 THz band. Based on rigorous coupled-wave analysis (RCWA) and simulated annealing algorithm, we proposed an efficient algorithm to optimize the polarizer. After calculations, 98.45% single-port high-efficiency reflection for transverse electric (TE) polarization and 42.33%/42.57% highly uniform dual-port beam splitting for transverse magnetic (TM) polarization were finally obtained. In addition, through RCWA and simplified modal method, the electromagnetic field distributions of TE and TM polarizations are shown visually and described quantitatively. Moreover, the results displayed in section 3 prove that the grating possesses the characteristics of relatively large bandwidth and insensitivity to the incident angle. Therefore, the novel scheme in this paper has great reference value for the research of terahertz modulation devices and the integration of terahertz communication systems.
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