Transverse Anderson localization of channel plasmon polaritons

0499888 - ÚFE 2019 RIV US eng J - Journal Article
Petráček, J. - Kuzmiak, Vladimír
Transverse Anderson localization of channel plasmon polaritons.
Physical Review A. Roč. 98, č. 2 (2018), č. článku 023806. ISSN 2469-9926. E-ISSN 2469-9934
R&D Projects: GA ČR(CZ) GA16-00329S
Institutional support: RVO:67985882
Keywords : Optical waveguides * Phonons * Electric fields
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.907, year: 2018

We studied numerically the effect of disorder on the propagation of the channel plasmon polaritons (CPP) in arrays of evanescently coupled rectangular grooves cut into the planar surface of metal in contact with vacuum or a dielectric medium. The grooves are assumed to be of the same width and depth while an off-diagonal disorder is introduced by randomly varying the distance between the grooves. To explore conditions under which transverse Anderson localization can be observed we employ a numerical technique based on the coupled mode theory. The distribution of the electric field of the CPP beam evaluated for a random system exhibits a transition from ballistic spreading of the CPP wave packets to transverse localization with an increasing disorder. We found that the interplay between the Ohmic losses and the coupling coefficients between the neighboring grooves plays a central role in realization of the transverse Anderson localization. We suggest two strategies, which are beneficial for its observation and discuss a potential impact of randomness on beam steering in the plasmonic nanodevices
Permanent Link: http://hdl.handle.net/11104/0292075