1.
Opt Express
; 30(5): 6970-6980, 2022 Feb 28.
Article
in English
| MEDLINE
| ID: mdl-35299470
ABSTRACT
We characterize the nonlinear optical properties of synthesized Bi2Te3 nanoparticle-contained thin films using the tunable femtosecond laser in the spectral range of 400-1000â nm. These nanoparticles possess a strong saturable absorption and positive nonlinear refraction (-6.8×10-5 cm W-1 in the case of 500â nm, 150 fs probe pulses, and 3×10-10 cm2 W-1 in the case of 400â nm, 150 fs probe pulses, respectively). The spectral, intensity, and temporal variation of saturable absorption and nonlinear refraction of the thin films containing exfoliated Bi2Te3 nanoparticles are discussed.