nn7b07823_si_001.pdf (2.45 MB)
Two-Dimensional Pyramid-like WS2 Layered Structures for Highly Efficient Edge Second-Harmonic Generation
journal contribution
posted on 2018-01-02, 00:00 authored by Xianqing Lin, Yingying Liu, Kang Wang, Cong Wei, Wei Zhang, Yongli Yan, Yong Jun Li, Jiannian Yao, Yong Sheng ZhaoTwo-dimensional
(2D) layered materials, with large second-order
nonlinear susceptibility, have received much scientific interest due
to their potential applications in nonlinear optical devices. However,
the atomic thickness of 2D layered materials leads to poor field confinement
and weak light–matter interaction at the nanoscale, resulting
in low nonlinear conversion efficiency. Here, 2D pyramid-like multilayer
(P-multilayer) layered structures are fabricated for efficient edge
second-harmonic generation (SHG) based on the enhanced light–matter
interaction in whispering-gallery mode (WGM) cavities. The P-multilayer
2D layered materials, where the basal planes shrink gradually from
the bottom to the top layers, exhibit efficient edge SH radiation
due to the partial destructive interference of nonlinear polarizations
between the neighboring atomic layers. Moreover, the well-defined
2D plate-like triangle morphology of P-multilayer WS2 forms
a WGM resonance cavity, which results in enhanced light–matter
interaction and thus the enhancement of edge SHG, which can be further
enhanced by hybridizing the WGM mode with plasmonics. These results
provide enlightenment for the construction of specific structures
for efficient nonlinear processes.
History
Usage metrics
Categories
Keywords
P-multilayer 2 Dnonlinear conversion efficiencyWGM modeedge second-harmonic generationbasal planesedge SHGnonlinear polarizationsedge SH radiation2 D pyramid-likenonlinear susceptibilitywhispering-gallery modeP-multilayer WS 2 formsmaterialWGM resonance cavitynonlinear processesTwo-Dimensional Pyramid-like WS 2 Layered Structures2 Dinteractionfield confinement2 D plate-like triangle morphology
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC