CST – Computer Simulation Technology

Broadband Brewster transmission through 2D metallic gratings
Khai Q. Le, Christos Argyropoulos, Nadia Mattiucci, Giuseppe D'Aguanno, Mark J. Bloemer, Andrea Alù
Journal of Applied Physics
Volume. 112, Issue. 9, 25 March 2012
094317 - 094317-4
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. VC 2012 American Institute of Physics.

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