Second- A nd third-order optical susceptibilities across excitons states in 2D monolayer transition metal dichalcogenides

Lucas Lafeta, Aurea Corradi, Tianyi Zhang, Ethan Kahn, Ismail Bilgin, Bruno R. Carvalho, Swastik Kar, Mauricio Terrones, Leandro M. Malard

Research output: Contribution to journalArticlepeer-review

Abstract

Semiconducting transition metal dichalcogenides have significant nonlinear optical effects. In this work we have used second-harmonic generation and the four-wave mixing spectroscopy in resonance with the excitons in MoS2, MoSe2, and WS2 monolayers to characterize the nonlinear optical properties of these materials. We show that trions and excitons are responsible for enhancing the nonlinear optical response and determine the exciton and trion energies by comparing with the photoluminescence spectra. Moreover, we extract the second- A nd third-order optical sheet susceptibility (χ (2) and χ (3)) across exciton energies and compare with values found in the literature. We also demonstrate the ability to generate different nonlinear effects in a wide spectral range in the visible region for monolayer MoS2, opening the possibility of using two-dimensional materials for nonlinear optoelectronic and photonic applications.

Original languageEnglish (US)
Article number035010
Journal2D Materials
Volume8
Issue number3
DOIs
StatePublished - Jul 2021

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Second- A nd third-order optical susceptibilities across excitons states in 2D monolayer transition metal dichalcogenides'. Together they form a unique fingerprint.

Cite this