Open AccessExtraordinary optical transmission inside a waveguide: spatial mode dependence
Author(s) -
Kimberly S. Reichel,
Ponzy Lu,
Sterling Backus,
Rajind Mendis,
Daniel M. Mittleman
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.028221
Subject(s) - optics , extraordinary optical transmission , terahertz radiation , waveguide , surface plasmon , materials science , transmission (telecommunications) , excitation , plasmon , optoelectronics , physics , surface plasmon polariton , telecommunications , computer science , quantum mechanics
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.