Optimization of the thickness dependent third order optical nonlinearities of 2D Bi2Se3 layers
Article
Karimbana-Kandy, A, Lemarchand, F, Campos, A et al. (2023). Optimization of the thickness dependent third order optical nonlinearities of 2D Bi2Se3 layers
. OPTICAL MATERIALS, 143 10.1016/j.optmat.2023.114211
Karimbana-Kandy, A, Lemarchand, F, Campos, A et al. (2023). Optimization of the thickness dependent third order optical nonlinearities of 2D Bi2Se3 layers
. OPTICAL MATERIALS, 143 10.1016/j.optmat.2023.114211
The thickness-dependent saturable absorption behaviour of atomically thin bismuth selenide films has been optimized using 515 nm and 1030 nm laser excitation wavelengths. The studies have been performed by the Z-scan technique employing 400 fs laser pulses emitted by a fiber laser at a repetition rate of 100 Hz. The obtained results allowed the determination of the nonlinear optical parameters as a function of the film thickness. Additional studies have been carried out in order to determine the third-order optical nonlinearities as a function of the annealing temperature. The samples have also been studied by spectrophotometry, electron microscopy and X-ray diffraction, which allowed a deeper knowledge of the optical properties, as well as the crystalline structure of the Bi2Se3 material.
