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Title: Investigation of plasmon resonance tunneling through subwavelength hole arrays in highly doped conductive ZnO films

Experimental results pertaining to plasmon resonance tunneling through a highly conductive zinc oxide (ZnO) layer with subwavelength hole-arrays is investigated in the mid-infrared regime. Gallium-doped ZnO layers are pulsed-laser deposited on a silicon wafer. The ZnO has metallic optical properties with a bulk plasma frequency of 214 THz, which is equivalent to a free space wavelength of 1.4 μm. Hole arrays with different periods and hole shapes are fabricated via a standard photolithography process. Resonant mode tunneling characteristics are experimentally studied for different incident angles and compared with surface plasmon theoretical calculations and finite-difference time-domain simulations. Transmission peaks, higher than the baseline predicted by diffraction theory, are observed in each of the samples at wavelengths that correspond to the excitation of surface plasmon modes.
Authors:
;  [1] ;  [2] ; ; ;  [3] ;  [3] ;  [2] ;  [2] ;  [4]
  1. Solid State Scientific Corporation, 12 Simon St., Nashua, New Hampshire 03060 (United States)
  2. (United States)
  3. Air Force Research Laboratory, Sensors Directorate, 2241 Avionics Circle, Wright Patterson AFB, Ohio 45433 (United States)
  4. Department of Electrical and Computer Engineering, University of Alabama in Huntsville, 301 Sparkman Drive, Huntsville, Alabama 35899 (United States)
Publication Date:
OSTI Identifier:
22492885
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 17; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIFFRACTION; DOPED MATERIALS; FILMS; GALLIUM; HOLES; LANGMUIR FREQUENCY; LAYERS; OPTICAL PROPERTIES; RESONANCE; SILICON; SURFACES; TUNNEL EFFECT; WAVELENGTHS; ZINC OXIDES