A 310 nm Optically Pumped AlGaN Vertical-Cavity Surface-Emitting Laser.

ABSTRACT: Ultraviolet light is essential for disinfection, fluorescence excitation, curing, and medical treatment. An ultraviolet light source with the small footprint and excellent optical characteristics of vertical-cavity surface-emitting lasers (VCSELs) may enable new applications in all these areas. Until now, there have only been a few demonstrations of ultraviolet-emitting VCSELs, mainly optically pumped, and all with low Al-content AlGaN cavities and emission near the bandgap of GaN (360 nm). Here, we demonstrate an optically pumped VCSEL emitting in the UVB spectrum (280-320 nm) at room temperature, having an Al_0.60Ga_0.40N cavity between two dielectric distributed Bragg reflectors. The double dielectric distributed Bragg reflector design was realized by substrate remov

SUBMITTER: Hjort F 

PROVIDER: S-EPMC7821306 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature