Open AccessHigh order plasmonic vortex generation based on spiral nanoslits
Author(s) -
Jing Fang,
Changda Zhou,
Zhen Mou,
Shuyun Wang,
Jinlong Yu,
Yuanjie Yang,
Greg Gbur,
Shuyun Teng,
Yangjian Cai
Publication year - 2021
Publication title -
new journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.584
H-Index - 190
ISSN - 1367-2630
DOI - 10.1088/1367-2630/abe72c
Subject(s) - vortex , plasmon , physics , optical vortex , topological quantum number , spiral (railway) , angular momentum , plasmonic lens , optics , surface plasmon polariton , surface plasmon , classical mechanics , quantum mechanics , mechanics , mathematical analysis , mathematics
Highly localized plasmonic vortices carrying orbital angular momentum are of importance for many applications. Yet, it is a challenge to generating plasmonic vortex with a high topological charge because of no available technique. Here, a novel plasmonic vortex generator is proposed based on spiral nanoslits etched in a metal film, which can produce a high order plasmonic vortex. The consecutive spiral nanoslit can generate plasmonic vortex with high intensity and the segmented nanoslits enhances the controllability of the plasmonic vortex, which are demonstrated numerically and experimentally. High order plasmonic vortex generation will broaden the prospects for plasmonic vortices in practical applications for nanomanipulation and nanofabrication.