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Title: Resonance spectra of diabolo optical antenna arrays

A complete set of diabolo optical antenna arrays with different waist widths and periods was fabricated on a sapphire substrate by using a standard e-beam lithography and lift-off process. Fabricated diabolo optical antenna arrays were characterized by measuring the transmittance and reflectance with a microscope-coupled FTIR spectrometer. It was found experimentally that reducing the waist width significantly shifts the resonance to longer wavelength and narrowing the waist of the antennas is more effective than increasing the period of the array for tuning the resonance wavelength. Also it is found that the magnetic field enhancement near the antenna waist is correlated to the shift of the resonance wavelength.
Authors:
;  [1] ; ;  [2]
  1. Department of Electrical and Computer Engineering, University of Alabama in Huntsville, 301 Sparkman Drive, Huntsville, AL 35899 (United States)
  2. Naval Research Laboratory, 4555 Overlook Ave., SW Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
22492145
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 10; 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; ABSORPTION SPECTROSCOPY; ANTENNAS; ELECTRON BEAMS; FOURIER TRANSFORMATION; INFRARED SPECTRA; MAGNETIC FIELDS; RESONANCE; SAPPHIRE; SPECTRAL REFLECTANCE; SUBSTRATES; WAVELENGTHS