title: Saturable absorption in one-dimensional Sb2Se3nanowires in the visible to near-infrared region.
abstract: One-dimensional (1D) free-standing nanowires are particularly important for carrier confinement in two dimensions, which provides a platform to explore the nonlinear optical phenomena at the nanoscale. In this Letter, we demonstrate saturable absorption in the resonant and above-bandgap excitations of both ns and fs pulses in 1D crystalline Sb2Se3nanowires prepared by the facile hydrothermal method. Impressively, the average length of the nanowires extends to a few micrometers with a high aspect ratio of 300. The excited-state to ground-state absorption cross-section ratio in Sb2Se3nanowires is ≈0.23, which suggests that they can be utilized as passive mode lockers.
authors.forename: Rajesh Kumar
authors.initials: RK
authors.lastname: Yadav
authors.forename: Rituraj
authors.initials: R
authors.lastname: Sharma
authors.forename: J
authors.initials: J
authors.lastname: Aneesh
authors.forename: P
authors.initials: P
authors.lastname: Abhiramnath
authors.forename: K V
authors.initials: KV
authors.lastname: Adarsh