Extraordinary optical transmission inside a waveguide: spatial mode dependence

We study the influence of the input spatial mode on the extraordinary optical transmission (EOT) effect. By placing a metal screen with a 1D array of subwavelength holes inside a terahertz (THz) parallel-plate waveguide (PPWG), we can directly compare the transmission spectra with different input wa...

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Bibliographic Details
Published inOptics express Vol. 24; no. 25; pp. 28221 - 28227
Main Authors Reichel, Kimberly S, Lu, Peter Y, Backus, Sterling, Mendis, Rajind, Mittleman, Daniel M
Format Journal Article
LanguageEnglish
Published United States 12.12.2016
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Summary:We study the influence of the input spatial mode on the extraordinary optical transmission (EOT) effect. By placing a metal screen with a 1D array of subwavelength holes inside a terahertz (THz) parallel-plate waveguide (PPWG), we can directly compare the transmission spectra with different input waveguide modes. We observe that the transmitted spectrum depends strongly on the input mode. A conventional description of EOT based on the excitation of surface plasmons is not predictive in all cases. Instead, we utilize a formalism based on impedance matching, which accurately predicts the spectral resonances for both TEM and non-TEM input modes.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.24.028221