Chirality-Dependent Second Harmonic Generation of MoS 2 Nanoscroll with Enhanced Efficiency
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1669764.pdf
Description
Accepted version
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3.43 MB
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Author(s)
Qian, Qingkai
Zu, Rui
Ji, Qingqing
Jung, Gang Seob
Zhang, Kunyan
Zhang, Ye
Buehler, Markus J
Kong, Jing
Gopalan, Venkatraman
Huang, Shengxi
Date Issued
September 2020
Journal
ACS Nano
Publisher
American Chemical Society (ACS)
Citation
Qingkai Qian, Rui Zu, Qingqing Ji, Gang Seob Jung, Kunyan Zhang, Ye Zhang, Markus J. Buehler, Jing Kong, Venkatraman Gopalan, and Shengxi Huang, Chirality-Dependent Second Harmonic Generation of MoS2 Nanoscroll with Enhanced Efficiency, ACS Nano 2020 14 (10)
Version
Author's final manuscript
Abstract
© 2020 American Chemical Society. Materials with high second harmonic generation (SHG) efficiency and reduced dimensions are favorable for integrated photonics and nonlinear optical applications. Here, we fabricate MoS2 nanoscrolls with different chiralities and study their SHG performances. As a 1D material, MoS2 nanoscroll shows reduced symmetry and strong chirality dependency in the polarization-resolved SHG characterizations. This SHG performance can be well explained by the superposition theory of second harmonic field of the nanoscroll walls. MoS2 nanoscrolls with certain chiralities and diameters in our experiment can have SHG intensity up to 95 times stronger than that of monolayer MoS2, and the full potential can still be further exploited. The same chirality-dependent SHG can be expected for nanoscrolls or nanotubes composed of other noncentrosymmetric 2D materials, such as WS2, WSe2, and hBN. The characterization and analysis results presented here can also be exploited as a nondestructive technique to determine the chiralities of these nanoscrolls and nanotubes.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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DOI of Published Version
https://doi.org/10.1021/ACSNANO.0C05189
