title: A simple method for generating unidirectional surface plasmon polariton beams with arbitrary profiles.
abstract: The efficient steering of surface plasmon polariton (SPP) fields is a vital issue in various plasmonic applications, such as plasmonic circuitry. We present a straightforward and efficient method for generating unidirectionally propagating SPP beams with arbitrary amplitude and phase profiles by manipulating Δ-shaped nanoantennas. As an example, a second-order Hermite-Gauss SPP beam is generated with this method. The near-field distribution of the generated SPP beam is experimentally characterized to validate the effectiveness of the method.
authors.forename: Oubo
authors.initials: O
authors.lastname: You
authors.forename: Benfeng
authors.initials: B
authors.lastname: Bai
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Wu
authors.forename: Zhendong
authors.initials: Z
authors.lastname: Zhu
authors.forename: Qixia
authors.initials: Q
authors.lastname: Wang