Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4883746
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A2A2A01018250]
- National Research Foundation of Korea [2012R1A2A2A01018250] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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-mu m-wide metasurface containing only nineteen Si grating ridges. Under a 10-mu m-wide unpolarized Gaussian beam incidence at wavelength of 1.55 mu m, the resulting device shows promising theoretical performance with high power efficiency exceeding 80% and polarization extinction ratio of similar to 10 dB with focal spot diameters near 1-2 mu m. (C) 2014 AIP Publishing LLC.
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