Second harmonic generation from multilayer hexagonal boron nitride

2019 ◽  
Author(s):  
Sejeong Kim ◽  
Johannes E. Fröch ◽  
Augustine Gardner ◽  
Chi Li ◽  
Igor Aharonovich ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Hexagonal Boron Nitride ◽  
Second Harmonic

scholarly journals Second harmonic generation in defective hexagonal boron nitride

2020 ◽  
Vol 32 (19) ◽  
pp. 19LT01 ◽  
Author(s):  
Renan Cunha ◽  
Alisson Cadore ◽  
Sérgio L L M Ramos ◽  
Kenji Watanabe ◽  
Takashi Taniguchi ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Hexagonal Boron Nitride ◽  
Second Harmonic

scholarly journals Second-harmonic generation in multilayer hexagonal boron nitride flakes

2019 ◽  
Vol 44 (23) ◽  
pp. 5792 ◽  
Author(s):  
Sejeong Kim ◽  
Johannes E. Fröch ◽  
Augustine Gardner ◽  
Chi Li ◽  
Igor Aharonovich ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Hexagonal Boron Nitride ◽  
Second Harmonic

scholarly journals Enhanced tunable second harmonic generation from twistable interfaces and vertical superlattices in boron nitride homostructures

2021 ◽  
Vol 7 (10) ◽  
pp. eabe8691
Author(s):  
Kaiyuan Yao ◽  
Nathan R. Finney ◽  
Jin Zhang ◽  
Samuel L. Moore ◽  
Lede Xian ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Frequency Conversion ◽  
Hexagonal Boron Nitride ◽  
Second Harmonic ◽  
Complete Control ◽  
Broken Symmetries ◽  
Superlattice Structures ◽  
Tunable Frequency

Broken symmetries induce strong even-order nonlinear optical responses in materials and at interfaces. Unlike conventional covalently bonded nonlinear crystals, van der Waals (vdW) heterostructures feature layers that can be stacked at arbitrary angles, giving complete control over the presence or lack of inversion symmetry at a crystal interface. Here, we report highly tunable second harmonic generation (SHG) from nanomechanically rotatable stacks of bulk hexagonal boron nitride (BN) crystals and introduce the term twistoptics to describe studies of optical properties in twistable vdW systems. By suppressing residual bulk effects, we observe SHG intensity modulated by a factor of more than 50, and polarization patterns determined by moiré interface symmetry. Last, we demonstrate greatly enhanced conversion efficiency in vdW vertical superlattice structures with multiple symmetry-broken interfaces. Our study paves the way for compact twistoptics architectures aimed at efficient tunable frequency conversion and demonstrates SHG as a robust probe of buried vdW interfaces.

Test of directional photoionisation models of second harmonic generation in optical fibres

1992 ◽  
Vol 139 (2) ◽  
pp. 133 ◽  
Author(s):  
N.M. Lawandy ◽  
T.J. Driscoll ◽  
C.L. Adler ◽  
N.M. Lawandy
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Optical Fibres
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