Enhanced four-wave mixing process near the excitonic resonances of bulk MoS2 Academic Article uri icon

abstract

  • 2019 Chinese Laser Press. Two-dimensional materials are generating great interest due to their unique electrical and optical properties. In particular, transition metal dichalcogenides such as molybdenum disulfide (MoS 2 ) are attractive materials due to the existence of a direct band gap in the monolayer limit that can be used to enhance nonlinear optical phenomena, such as Raman spectroscopy. Here, we have investigated four-wave mixing processes in bulk MoS 2 using a multiplex coherent anti-Stokes Raman spectroscopy setup. The observed four-wave mixing signal has a resonance at approximately 680 nm, corresponding to the energy of the A excitonic transition of MoS 2 . This resonance can be attributed to the increased third-order nonlinear susceptibility at wavelengths near the excitonic transition. This phenomenon could open the path to using MoS 2 as a substrate for enhancing four-wave mixing processes such as coherent anti-Stokes Raman spectroscopy.

published proceedings

  • PHOTONICS RESEARCH

author list (cited authors)

  • Ko, B. A., Sokolov, A. V., Scully, M. O., Zhang, Z., & Lee, H.

citation count

  • 13

complete list of authors

  • Ko, Brian A||Sokolov, Alexei V||Scully, Marlan O||Zhang, Zhenrong||Lee, Ho Wai Howard

publication date

  • March 2019