Ultralow threshold surface emitting ultraviolet lasers with semiconductor nanowires.

ABSTRACT: Surface-emitting (SE) semiconductor lasers have changed our everyday life in various ways such as communication and sensing. Expanding the operation wavelength of SE semiconductor lasers to shorter ultraviolet (UV) wavelength range further broadens the applications to disinfection, medical diagnostics, phototherapy, and so on. Nonetheless, realizing SE lasers in the UV range has remained to be a challenge. Despite of the recent breakthrough in UV SE lasers with aluminum gallium nitride (AlGaN), the electrically injected AlGaN nanowire UV lasers are based on random optical cavities, whereas AlGaN UV vertical-cavity SE lasers (VCSELs) are all through optical pumping and are all with large lasing threshold power densities in the range of several hundred kW/cm² to MW/cm².

SUBMITTER: Vafadar MF 

PROVIDER: S-EPMC10126006 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature