Lei Pang, Yang Cheng, Wu Zhao, Shaoyang Tan, Yintao Guo, Bo Li, Jun Wang, Dayong Zhou. Mid-infrared quantum cascade laser grown by MOCVD at 4.6 µm[J]. Infrared and Laser Engineering, 2022, 51(6): 20210980
- Infrared and Laser Engineering
- Vol. 51, Issue 6, 20210980 (2022)
Fig. 1. Reflectance curve monitoring of three samples with different doping concentrations
Fig. 2. AFM images (5 µm×5 µm) of three samples with different doping concentrations
Fig. 3. X-ray spectra of three samples with different doping concentrations
Fig. 4. Cross-sectional scanning electron microscope image of the double-channel structure
Fig. 5. L-I-V curves of samples with different doping concentrations
Fig. 6. (a) L-I-V curves of the chip at different temperatures; (b) Wall-plug efficiency of the chip at different temperatures
Fig. 7. Threshold current density and characteristic temperature T 0 at different temperatures
Fig. 8. L-I-V and spectra in continuous-wave operation at room temperature
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