scholarly journals Nonreciprocal second harmonic generation in a magnetoelectric material

2021 ◽  
Vol 7 (16) ◽  
pp. eabe2793
Author(s):  
Shingo Toyoda ◽  
Manfred Fiebig ◽  
Taka-hisa Arima ◽  
Yoshinori Tokura ◽  
Naoki Ogawa
Keyword(s):  
Second Harmonic Generation ◽  
Magnetic Dipole ◽  
Harmonic Generation ◽  
Electric Dipole ◽  
Second Harmonic ◽  
Electric Dipole Transition ◽  
Dipole Transition ◽  
Fundamental Properties ◽  
Propagation Of Light ◽  
Backward Propagation

Mirror symmetries are of particular importance because they are connected to fundamental properties and conservation laws. Spatial inversion and time reversal are typically associated to charge and spin phenomena, respectively. When both are broken, magnetoelectric cross-coupling can arise. In the optical regime, a difference between forward and backward propagation of light may result. Usually, this nonreciprocal response is small. We show that a giant nonreciprocal optical response can occur when transferring from linear to nonlinear optics, specifically second harmonic generation (SHG). CuB2O4 exhibits SHG transmission changes by almost 100% upon reversal of a magnetic field of just ±10 mT. The observed nonreciprocity results from an interference between magnetic-dipole and electric-dipole SHG. Although the former is inherently weaker than the latter, a resonantly enhanced magnetic-dipole transition has a comparable amplitude as a nonresonant electric-dipole transition, thus maximizing the nonreciprocity. Multiferroics and magnetoelectrics are an obvious materials platform to exhibit nonreciprocal nonlinear optical functionalities.

Second Harmonic Generation and Magnetic-Dipole-Electric-Dipole Interference in AntiferromagneticCr2O3

1994 ◽  
Vol 73 (15) ◽  
pp. 2127-2130 ◽  
Author(s):  
M. Fiebig ◽  
D. Fröhlich ◽  
B. B. Krichevtsov ◽  
R. V. Pisarev
Keyword(s):  
Second Harmonic Generation ◽  
Magnetic Dipole ◽  
Harmonic Generation ◽  
Electric Dipole ◽  
Second Harmonic

Electric dipole origin of the second harmonic generation of small metallic particles

2005 ◽  
Vol 71 (16) ◽  
Author(s):  
J. Nappa ◽  
G. Revillod ◽  
I. Russier-Antoine ◽  
E. Benichou ◽  
C. Jonin ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Electric Dipole ◽  
Second Harmonic ◽  
Metallic Particles

scholarly journals Peculiar electronic, strong in-plane and out-of-plane second harmonic generation and piezoelectric properties of atom-thick α-M2X3 (M = Ga, In; X = S, Se): role of spontaneous electric dipole orientations

RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 55034-55043 ◽  
Author(s):  
Lei Hu ◽  
Xuri Huang
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Electric Dipole ◽  
Piezoelectric Properties ◽  
Second Harmonic ◽  
Out Of Plane

Single- and few-layer α-M2X3 nanosheets exhibit out-of-plane SHG and piezoelectric properties, which can be tuned by switching spontaneous polarizations.

Second-harmonic generation interferometry in magnetic-dipole nanostructures

2015 ◽  
Vol 40 (16) ◽  
pp. 3758 ◽  
Author(s):  
I. A. Kolmychek ◽  
A. Yu. Bykov ◽  
E. A. Mamonov ◽  
T. V. Murzina
Keyword(s):  
Second Harmonic Generation ◽  
Magnetic Dipole ◽  
Harmonic Generation ◽  
Second Harmonic

scholarly journals Significantly enhanced second-harmonic generations with all-dielectric antenna array working in the quasi-bound states in the continuum and excited by linearly polarized plane waves

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhanghua Han ◽  
Fei Ding ◽  
Yangjian Cai ◽  
Uriel Levy
Keyword(s):  
Second Harmonic Generation ◽  
Magnetic Dipole ◽  
Harmonic Generation ◽  
Bound States ◽  
Second Harmonic ◽  
Generation Efficiency ◽  
Second Harmonic Generation Efficiency ◽  
Linearly Polarized ◽  
Magnetic Dipole Resonances ◽  
The Continuum

AbstractThe recently emerging all-dielectric optical nanoantennas based on high-index semiconductors have proven to be an effective and low-loss alternative to metal-based plasmonic structures for light control and manipulations of light–matter interactions. Nonlinear optical effects have been widely investigated to employ the enhanced interactions between incident light and the dielectrics at the Mie-type resonances, and in particular magnetic dipole resonances, which are supported by the semiconductor. In this paper, we explore the novel phenomenon of bound states in the continuum supported by high-index semiconductor nanostructures. By carefully designing an array of nanodisk structures with an inner air slot as the defect, we show that a novel high quality-factor resonance achieved based on the concept of bound state in the continuum can be easily excited by the simplest linearly polarized plane wave at normal incidence. This resonance further enhances the interactions between light and semiconductors and boosts the nonlinear effects. Using AlGaAs as the nonlinear material, we demonstrate a significant increase in the second-harmonic generation efficiency, up to six orders of magnitude higher than that achieved by magnetic dipole resonances. In particular, a second-harmonic generation efficiency around 10% can be numerically achieved at a moderate incident pump intensity of 5 MW/cm2.

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