Highly efficient beam splitter based on all-dielectric metasurfaces

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Abstract

The recent exploration of metasurfaces reveals potential for developing virtually flat optics. In this work, a highly efficient beam splitter based on all-dielectric metasurfaces is demonstrated for visible light by finite-difference-time-domain simulations. The structure consists of a TiO2 nano-cylinder array and a layer-by-layer reflector with high efficiency separated by a SiO2 spacer. A conversion efficiency higher than 90% can be readily achieved over a wavelength range from 490 to 560 nm for the proposed device.

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Lin, Y., Wang, M., Sui, Z., Zeng, Z., & Jiang, C. (2019). Highly efficient beam splitter based on all-dielectric metasurfaces. Japanese Journal of Applied Physics, 58(6). https://doi.org/10.7567/1347-4065/ab219b

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