光学
极化(电化学)
材料科学
消光比
各向异性
分束器
偏振器
径向极化
双折射
线极化
光电子学
偏振旋转器
作者
Daxing Dong,Youwen Liu,Yue Fei,Yongqing Fan,Junsheng Li,Yangyang Fu
出处
期刊:Optics Express
[The Optical Society]
日期:2020-03-16
卷期号:28 (6): 8371-8383
被引量:3
摘要
Properly designed black phosphorus (BP) ribbons exhibit extreme anisotropic properties, which can be used to fabricate a high-efficiency transmitter or reflector depending on the linear polarization of excitation. In this study, we design a highly efficient and broad-angle polarization beam splitter (PBS) based on extremely anisotropic BP ribbons around the mid-infrared frequency region with an ultra-thin structure, and study its performance by using transfer matrix calculation and finite element simulation. In the broad frequency range of 80.4 terahertz - 85.0 terahertz (THz) and an wide angle range of more than 50°, the reflectivity and transmissivity of the designed PBS are both larger than 80% and the polarization extinction ratios are higher than 25.50 dB for s-polarization light and 20.40 dB for p- polarization light, respectively. Furthermore, the effect of incident angle and device parameters on the behavior of the proposed PBS is examined. Finally, we show that the operation frequency of this PBS can be tuned by the electron concentration of BP, which can facilitate some practical applications such as tunable polarization splitters or filters, and mid-infrared sensors.
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