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

Journal Article · Mon Jun 09 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4883746· OSTI ID:22300017

Lee, Jun Hyung; Jin Jung, Myoung; Woong Yoon, Jae; Magnusson, Robert ^[1]; Kyun Hong, Jong ^[2]

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1. Department of Electrical Engineering, University of Texas–Arlington, Arlington, Texas 76019 (United States)
2. Department of Electrical Engineering, Hanyang University, Seoul (Korea, Republic of)

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.

• OSTI ID: 22300017
• Journal Information: Applied Physics Letters, Vol. 104, Issue 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DISTRIBUTION
EFFICIENCY
EQUIPMENT
GRATINGS
POLARIZATION
POLARIZED BEAMS
SEMICONDUCTOR MATERIALS
SILICON
THIN FILMS
VISIBLE RADIATION
WAVELENGTHS