Asymmetric transmission of surface plasmon polaritons on planar gratings

0457443 - ÚFE 2016 RIV US eng J - Journal Article
Kuzmiak, Vladimír - Maradudin, A. A.
Asymmetric transmission of surface plasmon polaritons on planar gratings.
Physical Review. A. Roč. 92, č. 5 (2015), s. 538131-538139. ISSN 1050-2947
R&D Projects: GA MŠMT LH12009
Institutional support: RVO:67985882
Keywords : Electromagnetic wave polarization * Photons * Diffractive structures
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 2.808, year: 2014

We describe a surface structure consisting of a metal-air interface where the metallic part consists of two metallic segments with a periodic modulation of the interface between them. Such a structure possesses a different transmissivity for a surface plasmon polariton incident on it from one side of it than it has for a surface plasmon polariton incident on it from the opposite side. This asymmetric transmission of a surface plasmon polariton is based on the suppression of the zero-order Bragg beam which, for a certain value of the modulation depth, is not transmitted through the structure, while the diffraction efficiencies of the +1 and -1 Bragg beams can be modified by varying the period of the grating and/or the angle of incidence. For a certain range of the incidence angle one can observe asymmetry in transmittance for the -1 mode, while the +1 mode is completely suppressed. By varying the material and geometrical parameters of the diffractive structure one can control the contrast transmission that characterizes the degree of the asymmetry. This property of the structure is demonstrated by the results of computer simulation calculations
Permanent Link: http://hdl.handle.net/11104/0257844