Terahertz quantum-cascade (QC) lasers that operate in the vertical-external-cavity-surface-emitting-laser (VECSEL) configuration are enabled by the use of active reflectarray metasurfaces which serve as one mirror in an external cavity. We present the latest developments in THz QC-VECSELs, including watt-level output power in high-quality beam patterns.
We will review progress on GaN-based vertical-cavity surface-emitting lasers (VCSELs). A key challenge in GaN-based VCSELs is forming lattice matched distributed Bragg refelectors (DBRs). We will highlight an approach to DBRs that uses nanoporous GaN and present recent performance of electrically injected GaN-based VCSELs.
We will present light emitting diodes (LEDs) and lasers composed of metal halide perovskite semiconductors. They are capable of exceeding 17% external quantum efficiency, can be as flexible as organic electronic thin films, and possess tunable emission from the green to near infrared.
This study proposed performance of SiC-APD module in biological aerosol sensor system (BAS) instead of current PMT to detect harzardous airborne biologiclal components particles. The SiC-APD module integrated BAS has successfully detected NaCl, Tryptophan, Ovalbumin and fluorescence PSL particles below 10 um in diameter.