Electrically pumped semiconductor lasers are among the most important sources, owing to their high efficiency, compactness, and solid-state stability. For mid-infrared and terahertz radiation, quantum cascade lasers (QCLs) are the most important light sources operating via electrical pumping. To demonstrate single-mode laser emission, artificially designed distributed-feedback (DFB) gratings can be patterned on top of a ridge laser.
Topological bulk BICs enable compact, single-mode and beam-engineered QCLs
Phys.org - 20 Jun 2023 23:14
Electrically pumped semiconductor lasers are among the most important sources, owing to their high efficiency, compactness, and solid-state stability. For mid-infrared and terahertz radiation, quantum cascade lasers (QCLs) are the most important light sources operating via electrical pumping. To demonstrate single-mode laser emission, artificially designed distributed-feedback (DFB) gratings can be patterned on top of a ridge laser.
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