Demonstration of UV-A stimulated emission from optical pumping with a nano-porous cladding layer
We report a room-temperature ultraviolet-A (UV-A) stimulated emission from a multiple-quantum-well laser diode featuring a nano-porous bottom cladding layer on the GaN substrate. For a 1500×15 μ m ridge-type edge-emitting laser, we achieved a 372.8 nm emission under optical pumping, with a full-widt...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2024-01-01
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| Series: | Applied Physics Express |
| Subjects: | |
| Online Access: | https://doi.org/10.35848/1882-0786/ad9799 |
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| Summary: | We report a room-temperature ultraviolet-A (UV-A) stimulated emission from a multiple-quantum-well laser diode featuring a nano-porous bottom cladding layer on the GaN substrate. For a 1500×15 μ m ridge-type edge-emitting laser, we achieved a 372.8 nm emission under optical pumping, with a full-width-half-maximum (FWHM) of less than 2 nm and a threshold optical pumping power density of less than 1.2 MW cm ^−2 . The integration of a nano-porous cladding layer effectively minimizes lattice mismatch, enhances confinement factor, and maintains electrical conductivity. This demonstration expands the potential for developing high-performance UV laser diodes on GaN substrates, overcoming limitations previously imposed by critical thickness contrasts. |
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| ISSN: | 1882-0786 |