期刊
OPTICS LETTERS
卷 47, 期 3, 页码 517-520出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.447593
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资金
- National Science Foundation [CBET-1937949]
- University of Texas at Dallas
This paper achieves polarization-independent optical properties of black phosphorous (BP) metadevices by designing a single-layer pattern of 2D anisotropic material, and studies their performance as refractive index sensors.
The in-plane orientation-dependent electrical and optical properties of two-dimensional (2D) anisotropic materials attract significant attention because of the intriguing underlying physics. However, this feature limits their further development in polarization-independent applications such as refractive index sensors and light absorbers. In this paper, polarization-independent optical properties of black phosphorous (BP) metadevices are achieved by the design of a single-layer pattern of 2D anisotropic material. Finite-difference time-domain (FDTD) simulation results indicate that the absorption spectrum remains unchanged as the polarization angle of the incident light varies from 0 degrees to 360 degrees. The performance of the BP metadevices when used as refractive index sensors is also studied. The results show that the polarization-independent BP sensors exhibit high sensitivity and figures of merit (FOMs). This work opens up the possibility of fabricating optically polarization-independent devices based on a single-layer pattern of 2D anisotropic material. (C) 2022 Optica Publishing Group
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