Tuesday, November 29, 2016

Abstract-Extraordinary optical transmission inside a waveguide: spatial mode dependence

Kimberly S. Reichel, Peter Y. Lu, Sterling Backus, Rajind Mendis, and Daniel M. Mittleman

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.
© 2016 Optical Society of America

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