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Asymmetric coupling and dispersion of surface-plasmon-polariton waves on a periodically patterned anisotropic metal film

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.4904345· OSTI ID:22399192
;  [1];  [2]
  1. Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)
  2. Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

The morphology of a columnar thin film (CTF) of silver renders it an effectively biaxially anisotropic continuum. CTFs of silver deposited on one-dimensional gratings of photoresist showed strong blazing action and asymmetrically coupled optical radiation to surface-plasmon-polariton (SPP) waves propagating only along one direction supported by either the CTF/photoresist or the CTF/air interfaces. Homogenization of the CTFs using the Bruggeman formalism revealed them to display hyperbolic dispersion, and the dispersion of SPP waves was adequately described thereby.

OSTI ID:
22399192
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 117; ISSN JAPIAU; ISSN 0021-8979
Country of Publication:
United States
Language:
English

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