Giant saturable absorption in thin Sb2Te3 layers: Development and characterization
Conference
Verrone, RN, Campos, A, Cabié, M et al. (2021). Giant saturable absorption in thin Sb2Te3 layers: Development and characterization
. SMART BIOMEDICAL AND PHYSIOLOGICAL SENSOR TECHNOLOGY XI, 11872 10.1117/12.2597345
Verrone, RN, Campos, A, Cabié, M et al. (2021). Giant saturable absorption in thin Sb2Te3 layers: Development and characterization
. SMART BIOMEDICAL AND PHYSIOLOGICAL SENSOR TECHNOLOGY XI, 11872 10.1117/12.2597345
With the increase of laser powers and the decrease of pulse durations, materials with very large optical nonlinearities are of great interest for the laser community. Indeed, depending on the type of the nonlinearities, they can be used for several applications including frequency conversion and self-focusing. In particular, saturable absorbers are widely studied, as they allow mode-locking of laser systems or super-resolved laser writing. In this work, we have studied the saturable absorption efficiency of Sb2Te3 thin layers. Layers with thicknesses ranging from 2.5 nm to 30 nm have been deposited using electron beam deposition. These films were then annealed in a temperature controlled oven at 250 °C during 1 h to ensure that they are completely crystallized. These layers were then thoroughly studied with X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The nonlinear optical properties have been studied using the Z-Scan technique under femtosecond and nanosecond pulse irradiation. In this paper we present a study of the nonlinear optical properties of the Sb2Te3 layers.
