Ultrafast Third-Order Nonlinear Optical Response of 2D NbS2, NbSe2, ZrTe2, and MoS2 LTMDs in Suspension

• Published in: 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) p. 1
• Main Authors: Carvalho, Alyson J. A., Valente, Denise, Campos, Cecilia L. A. V., Jawaid, Ali M., Busch, Robert, Vaia, Richard A., Gomes, Anderson S. L.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 26-06-2023
• Subjects: Optical pumping; Optical variables measurement; Redox; Sulfur; Time measurement; Transition metal dichalcogenides; Ultrafast optics
• ISSN: 2833-1052
• DOI: 10.1109/CLEO/Europe-EQEC57999.2023.10231723

In this work, we study the third-order optical nonlinear (NLO) response of 2D layered transition metal dichalcogenide (LTMD) by means of the optical Kerr gate (OKG) technique. Such a technique relies on the nonlinear birefringence experienced by a probe beam after interaction with a pump beam in a nonlinear media, which allows a direct measurement of the third-order nonlinear optical coefficient associated with the effect, besides the response time of the nonlinearity. The materials under investigation are monolayer to a few layers of 2D semiconducting MoS 2 , metallic NbS 2 , NbSe 2 , and semi-metallic ZrTe 2 , all prepared by redox exfoliation method, as reported in [1]. The flakes are suspended in acetonitrile (ACN).