Nonlinear Optical Magnetism Revealed by Second-Harmonic
Generation in Nanoantennas
Version 2 2017-05-22, 17:06
Version 1 2017-05-22, 16:03
Posted on 2017-05-22 - 17:06
Nonlinear effects
at the nanoscale are usually associated with
the enhancement of electric fields in plasmonic structures. Recently
emerged new platform for nanophotonics based on high-index dielectric
nanoparticles utilizes optically induced magnetic response via multipolar
Mie resonances and provides novel opportunities for nanoscale nonlinear
optics. Here, we observe strong second-harmonic generation from AlGaAs
nanoantennas driven by both electric and magnetic resonances. We distinguish
experimentally the contribution of electric and magnetic nonlinear
response by analyzing the structure of polarization states of vector
beams in the second-harmonic radiation. We control continuously the
transition between electric and magnetic nonlinearities by tuning
polarization of the optical pump. Our results provide a direct observation
of nonlinear optical magnetism through selective excitation of multipolar
nonlinear modes in nanoantennas.
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Kruk, Sergey
S.; Camacho-Morales, Rocio; Xu, Lei; Rahmani, Mohsen; Smirnova, Daria A.; Wang, Lei; et al. (2017). Nonlinear Optical Magnetism Revealed by Second-Harmonic
Generation in Nanoantennas. ACS Publications. Collection. https://doi.org/10.1021/acs.nanolett.7b01488
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AUTHORS (10)
SK
Sergey
S. Kruk
RC
Rocio Camacho-Morales
LX
Lei Xu
MR
Mohsen Rahmani
DS
Daria A. Smirnova
LW
Lei Wang
HT
Hark Hoe Tan
CJ
Chennupati Jagadish
DN
Dragomir N. Neshev
YK
Yuri S. Kivshar
KEYWORDS
novel opportunitiesplasmonic structuresNanoantennas Nonlinear effectsmultipolar Mie resonancesAlGaAs nanoantennashigh-index dielectric nanoparticlesnanoscale nonlinear opticsvector beamsSecond-Harmonic Generationsecond-harmonic generationnonlinear responseNonlinear Optical Magnetism Revealedpolarization statesmultipolar nonlinear modessecond-harmonic radiation