Open AccessExploring optical resonances of nanoparticles excited by optical Skyrmion lattices
Author(s) -
Qiang Zhang,
Zhenzhen Liu,
Feifei Qin,
Shang Jie Zeng,
Dasen Zhang,
Zhiyuan Gu,
Xiangli Liu,
Jun Jun Xiao
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.27.007009
Subject(s) - multipole expansion , nanophotonics , photonics , plasmon , nanoparticle , toroid , skyrmion , physics , optical tweezers , metamaterial , optics , excited state , optoelectronics , materials science , nanotechnology , condensed matter physics , plasma , quantum mechanics
Recently, optical Skyrmion lattices (OSLs) have been realized in evanescent electromagnetic fields. OSLs possess topologically stable field configurations, which promise many optics and photonics applications. Here, we demonstrate that OSLs can serve as versatile structured optical near-fields to assist with studies of a variety of photonic modes in nanoparticles. We firstly show that OSL is capable of selectively exciting electric and magnetic multipole modes by placing a nanoparticle at different positions in the lattice. We then disclose that OSLs can efficiently excite some intriguing resonant modes, including toroidal and plasmonic dark modes, in dielectric or metal nanoparticles. Our results may enhance understanding of the interaction between OSLs and nanoparticles and find applications associated with precise control over resonant modes in nanostructures.