Surface plasmon mediated transmission of subwavelength slits at THz frequencies

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Surface plasmon mediated transmission of subwavelength slits at THz frequencies

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Title: Surface plasmon mediated transmission of subwavelength slits at THz frequencies
Author: Isaac, Thomas Henry
Gómez Rivas, J.
Sambles, J. Roy
Barnes, William L.
Hendry, Euan
Citation: 77 (11), article 113411
Publisher: American Physical Society
Journal: Physical Review B
Date Issued: 2008
URI: http://hdl.handle.net/10036/32474
DOI: 10.1103/PhysRevB.77.113411
Links: http://dx.doi.org/10.1103/PhysRevB.77.113411 http://link.aps.org/abstract/PRB/v77/e113411
Abstract: We present measurements and a numerical modeling that elucidate the role of surface plasmons in the resonant transmission of a subwavelength slit in a conducting material. By using THz time domain spectroscopy, we determine the Fabry–Pérot transmission resonances for a single slit formed from a wafer of a semiconductor with a surface plasma frequency in the THz frequency range. We measure large redshifts in the resonant frequencies close to the surface plasma frequency, which are 50% lower than the resonance frequencies expected well below the surface plasma frequency. This is an effect attributed to the coupling of plasmons on the adjacent surfaces of the slit.
Type: Article
Description: T. H. Isaac, J. Gómez Rivas, J. Roy Sambles, William L. Barnes, and Euan Hendry, Physical Review B, Vol. 77, article 113411 (2008). "Copyright © 2008 by the American Physical Society."
Keywords: red shiftsemiconductor materialssubmillimetre wave spectrasurface plasmons
ISSN: 109801211550235X


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