Open AccessSteering second-harmonic radiation through local excitations of plasmon
Author(s) -
Kyungwan Yoo,
Simon F. Becker,
Martin Silies,
Sunkyu Yu,
Christoph Lienau,
Namkyoo Park
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.018246
Subject(s) - plasmon , optics , directivity , beam steering , wavefront , surface plasmon , antenna (radio) , excitation , physics , second harmonic generation , harmonic , beam (structure) , optoelectronics , materials science , laser , telecommunications , acoustics , computer science , quantum mechanics
We propose an approach of steering the second harmonic (SH) emission from a single plasmonic structure, through local excitations of plasmon. The proposed idea is confirmed experimentally, by adjusting the incident beam position at the fundamental frequency, on a single plasmonic antenna. A significant directivity change ( ± 52°) for the SH emission is observed with submicrometer adjustment ( ± 250 nm) of the excitation beam position, over broadband SH frequencies. Providing a simple method of controlling the directivity of frequency-converted light, our approach paves the way to new design strategy for nonlinear optical devices with various nonlinear wavefronts.