Highly efficient beam splitter based on all-dielectric metasurfaces. (5th June 2019)

• Record Type: Journal Article
• Authors: Lin, Yu; Wang, Miao; Sui, Zhanpeng; Zeng, Zhongming; Jiang, Chunping
• Is Part Of: Japanese journal of applied physics. Volume 58:Number 6(2019)
• Publication Date: 2019-06-05
• Subjects: nanophotonics -- metasurface -- beam splitter; Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/ab219b
• Languages: English
• ISSNs: 0021-4922

Abstract

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.