Chirality-dependent second harmonic generation of MoS2nanoscroll with enhanced efficiency

Shengxi Huang, Qingkai Qian, Rui Zu, Qingqing Ji, Gang Seob Jung, Kunyan Zhang, Ye Zhang, Markus J. Buehler, Jing Kong, Venkatraman Gopalan

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Pages (from-to)13333-13342
Number of pages10
JournalACS nano
Volume14
Issue number10
DOIs
StatePublished - Oct 27 2020

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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