Abstract

When a surface plasmon polariton (SPP) is excited through a metallic grating in the conical mounting configuration, it propagates along a direction nonparallel to the grating Bragg vector. We will derive, under any possible coupling condition, the propagation direction as a function of experimental parameters, with particular attention to its relation with the azimuthal rotation angle. We will identify the conditions to achieve the maximum angular deflection with respect to the grating vector, also in relation to the grating geometry. Moreover, we will investigate the special configuration in which two SPP modes propagating toward different directions are simultaneously excited by the same light beam, suggesting to exploit this configuration to generate nondiffractive plasmonic beams (cosine–Gauss beams). The analytical treatment is supported by simulations with Chandezon’s method.

© 2015 Optical Society of America

Efficient excitation and control of arbitrary surface plasmon polariton beams using one-dimensional metallic gratings

Doron Bar-Lev, Ady Arie, Jacob Scheuer, and Itai Epstein
J. Opt. Soc. Am. B 32(5) 923-932 (2015)

Dynamical manipulation of Cosine-Gauss beams in a graphene plasmonic waveguide

Xueqing He, Tigang Ning, Rujiang Li, Li Pei, Jingjing Zheng, and Jing Li
Opt. Express 25(12) 13923-13932 (2017)

Spatial coupled-mode theory for surface plasmon polariton excitation at metallic gratings

Yijie Lou, Hong Pan, Tengfeng Zhu, and Zhichao Ruan
J. Opt. Soc. Am. B 33(5) 819-824 (2016)

Dynamic cosine-Gauss plasmonic beam through phase control

Kai Xiao, Shibiao Wei, Changjun Min, Guanghui Yuan, S. W. Zhu, T. Lei, and X. -C. Yuan
Opt. Express 22(11) 13541-13546 (2014)

Propagation and localization of a surface plasmon polariton on a finite grating

François Pincemin and Jean-Jacques Greffet
J. Opt. Soc. Am. B 13(7) 1499-1509 (1996)