High power hybrid-quantum-design based terahertz quantum cascade laser

Quanyong Lu

doi:10.1117/12.2681708

6 October 2023 High power hybrid-quantum-design based terahertz quantum cascade laser

Quanyong Lu

Proceedings Volume PC12683, Terahertz Emitters, Receivers, and Applications XIV; PC1268303 (2023) https://doi.org/10.1117/12.2681708
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

High-power terahertz (THz) sources are highly desired for applications in biomolecular and chemical sensing such as detection of DNA and protein, evaluation of pollutants and hazards, and atmosphere monitoring. THz Quantum cascade lasers (THz QCLs) are one of the most promising terahertz sources for those applications, with a vast commercial potential. Here, we present a high-power terahertz quantum cascade laser emitting at ~3.9 THz operating in continuous-wave operation. The high output power and wall-plug efficiency are achieved based on a hybrid bound-to-bound quantum active design. A record output power of 312 mW and a low threshold power density of 0.8 kW/mm3 in continuous-wave mode at 20 K is demonstrated for a 300-μm-wide and 2-mm-long device from single facet. The wall-plug efficiency is 1.38% and the slope efficiency is 684 mW/A with a differential quantum efficiency of ~120 photons per injected electron. The demonstration of this low-threshold and high-power THz laser will promote THz-based remote sensing and standoff detection for pharmaceutical and health industry applications.

Conference Presentation

Citation Download Citation

Quanyong Lu "High power hybrid-quantum-design based terahertz quantum cascade laser", Proc. SPIE PC12683, Terahertz Emitters, Receivers, and Applications XIV, PC1268303 (6 October 2023); https://doi.org/10.1117/12.2681708

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KEYWORDS

Quantum cascade lasers

Terahertz radiation

Continuous wave operation

High power lasers

Chemical weapons

Industrial applications

Laser applications

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