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4 March 2019 High efficiency anisotropic dual-band metasurface in the infrared region
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Proceedings Volume 10928, High Contrast Metastructures VIII; 109281J (2019) https://doi.org/10.1117/12.2507698
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
In this paper, we propose an anisotropic dual-band phase gradient metasurface in the infrared region based on tellurium material, which exhibits strong birefringence for z-cut. The refractive index of ordinary light no and extraordinary light ne are along the x- and y-direction of the metasurface, respectively. When a plane wave polarized along the x-direction is normally incident on the metasurface, the diffraction efficiency, which is defined as power of the deflected beam in the desired +1 diffraction order normalized to total transmission power, keeps higher than 95% within the wavelength from 7140nm to 7260nm, meanwhile the total transmission efficiency remains above 78%. On the other hand, the diffraction and total transmission efficiencies keep higher than 95% and 65% within wavelength range from 7840nm to 7940nm for the y-polarized illumination. The metasurface can be applied into polarization splitter, spectral beam splitter, and more in the future.
Conference Presentation
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Jing Li, Chang Liu, Yumin Liu, Yu Wang, Zhongyuan Yu, Han Ye, and Li Yu "High efficiency anisotropic dual-band metasurface in the infrared region", Proc. SPIE 10928, High Contrast Metastructures VIII, 109281J (4 March 2019); https://doi.org/10.1117/12.2507698
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