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

Jhuma Dutta, S. Anantha Ramakrishna, Akhlesh Lakhtakia

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number013102
JournalJournal of Applied Physics
Volume117
Issue number1
DOIs
StatePublished - Jan 7 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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