Electrical & Computer Engineering, Department of

 

Document Type

Article

Date of this Version

2012

Citation

JOURNAL OF APPLIED PHYSICS 112, 094317 (2012)

Comments

Copyright 2012 American Institute of Physics

http://dx.doi.org/10.1063/1.4764334

Abstract

Recently, we have introduced a mechanism to achieve ultrabroadband light funnelling and total transmission through 1D narrow metallic gratings at a specific incidence angle, the so-called plasmonic Brewster angle. This phenomenon is based on impedance matching between the guided modes supported by ultranarrow linear slits and transverse-magnetic waves at oblique incidence. In this paper, we demonstrate that such phenomenon, representing the equivalent of Brewster transmission for plasmonic screens, can also occur in 2D metallic gratings of various structural forms and shapes, and that it may be made insensitive to the azimuthal, or polarization, angle u. This finding may have relevant implications to realize large funneling, absorption and squeezing of light in perforated metallic screens.

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