Origin of the Efficient Nonlinear Optical Response of Two-dimensional Layered CuFeTe2 Nanosheets

Release time:2022-08-14

DOI number:10.1021/acs.jpclett.2c01740

Affiliation of Author(s):中南大学

Journal:The Journal of Physical Chemistry Letters

Abstract:Two-dimensional ternary transition metal chalcogenides (TMCs) have aroused great research interest owing to outstanding semiconducting properties and diverse magnetic response. CuFeTe2, as a typical TMC, exhibits ambiguous magnetic behavior and ground state of spin density waves nature. Herein, we first report efficient nonlinear absorption and superior nonlinear refraction of CuFeTe2 nanosheets. The nonlinear absorption and refraction coefficients reach -0.22 cm⁄GW and -1.66×10^(-12) 〖cm〗^2⁄W, respectively. Semi-empirical theory for direct bandgap semiconductor was applied to estimate the nonlinearities of CuFeTe2 nanosheets. The calculation results indicate that the efficient nonlinearities stem from free carriers induced band filling effect.

Co-author:Wenxuan Fan, Defeng Xu, Yulan Dong, Zhi Chen, Ziyang Gu, Mei Fang, Si Xiao

First Author:Zhihui Chen

Indexed by:Journal paper

Correspondence Author:Menglong Zhu, Jun He

Discipline:Natural Science

First-Level Discipline:Physics

Document Type:J

Translation or Not:no

Date of Publication:2022-08-14

Included Journals:SCI