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Resonance spectra of diabolo optical antenna arrays
Author(s) -
Hong Guo,
Blake S. Simpkins,
Joshua D. Caldwell,
Junpeng Guo
Publication year - 2015
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4935194
Subject(s) - materials science , optics , wavelength , transmittance , antenna (radio) , optoelectronics , spectrometer , nuclear magnetic resonance , physics , telecommunications , computer science
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

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