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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)
Event: SPIE OPTO, 2019, San Francisco, California, United States
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
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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