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Gold absorbers based on plasmonic tapered coaxial holes (PTCHs) are demonstrated theoretically and experimentally. An average absorption of over 0.93 is obtained theoretically in a broad wavelength range from 300

Gold absorbers based on plasmonic tapered coaxial holes (PTCHs) are demonstrated theoretically and experimentally. An average absorption of over 0.93 is obtained theoretically in a broad wavelength range from 300 nm to 900 nm without polarization sensitivity due to the structural symmetry. Strong scattering of the incident light by the tapered coaxial holes is the main reason for the high absorption in the short wavelength range below about 550 nm, while gap surface plasmon polaritons propagating along the taper dominate the resonance-induced high absorption in the long wavelength range.

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Date Created
  • 2014-12-29
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  • Text
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    Identifier
    • Digital object identifier: 10.1364/OE.22.032233
    • Identifier Type
      International standard serial number
      Identifier Value
      1094-4087
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    • This paper was published in OPTICS EXPRESS and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.22.032233, opens in a new window. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

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    Mo, Lei, Yang, Liu, Nadzeyka, Achim, Bauerdick, Sven, & He, Sailing (2014). Enhanced broadband absorption in gold by plasmonic tapered coaxial holes. OPTICS EXPRESS, 22(26), 32233-32244. http://dx.doi.org/10.1364/OE.22.032233

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