Exceptional Saturable Absorption in Wide-Bandgap Nanowires for Ultraviolet and Visible Light

Nanowires with wide bandgaps demonstrate remarkable saturable absorption capabilities, making them highly sought-after materials for various optical applications. Due to their inherent properties, these nanowires readily absorb single photons from a 355 nm laser. Simultaneously, they exhibit a strong affinity for excited-state absorption from a 532 nm laser. This unique dual-wavelength absorption behavior results in exceptional saturable absorption performance spanning the ultraviolet and visible light spectrum. The exceptional optical properties of these nanowires make them promising candidates for applications such as optical switching, laser mode-locking, and optical limiting.