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Title: A semiconductor metasurface with multiple functionalities: A polarizing beam splitter with simultaneous focusing ability

We propose a semiconductor metasurface that simultaneously performs two independent functions: focusing and polarization filtering. The wavefronts of the reflected and transmitted light distributions are precisely manipulated by spatial parametric variation of a subwavelength thin-film Si grating, which inherently possesses polarization filtering properties. We design a 12-μm-wide metasurface containing only nineteen Si grating ridges. Under a 10-μm-wide unpolarized Gaussian beam incidence at wavelength of 1.55 μm, the resulting device shows promising theoretical performance with high power efficiency exceeding 80% and polarization extinction ratio of ∼10 dB with focal spot diameters near 1–2 μm.
Authors:
; ;  [1] ; ;  [2] ;  [3]
  1. Department of Physics, Hanyang University, Seoul (Korea, Republic of)
  2. Department of Electrical Engineering, University of Texas–Arlington, Arlington, Texas 76019 (United States)
  3. Department of Electrical Engineering, Hanyang University, Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
22300017
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DISTRIBUTION; EFFICIENCY; EQUIPMENT; GRATINGS; POLARIZATION; POLARIZED BEAMS; SEMICONDUCTOR MATERIALS; SILICON; THIN FILMS; VISIBLE RADIATION; WAVELENGTHS