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26 September 2023 Current-injected continuous-wave AlGaN-based UVC laser diodes
Maki Kushimoto, Ziyi Zhang, Akira Yoshikawa, Koji Aoto, Yoshio Honda, Leo J. Schowalter, Chiaki Sasaoka, Hiroshi Amano
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Proceedings Volume PC12421, Gallium Nitride Materials and Devices XVIII; (2023) https://doi.org/10.1117/12.2650922
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
AlGaN-based UVC laser diodes operating at wavelengths are expected to be a low-cost, environmentally friendly, and highly efficient laser light source for a variety of applications. In this study, we further reduced the threshold gain by improving the optical confinement and improved the threshold current density while lowering drive voltage. A threshold current density of 2.8 kA/cm2 was achieved in pulsed current operation, and an operating voltage as low as 9.6 V was also achieved. Furthermore, the packaged device successfully emits CW light at a wavelength of 274.8 nm with a DC current operation of over 110 mA at 5°C.
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Maki Kushimoto, Ziyi Zhang, Akira Yoshikawa, Koji Aoto, Yoshio Honda, Leo J. Schowalter, Chiaki Sasaoka, and Hiroshi Amano "Current-injected continuous-wave AlGaN-based UVC laser diodes", Proc. SPIE PC12421, Gallium Nitride Materials and Devices XVIII, (26 September 2023); https://doi.org/10.1117/12.2650922
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KEYWORDS
Cladding
Continuous wave operation
Semiconductor lasers
Aluminum
Refractive index
Resistance
Waveguides
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