Laser diodes with 353 nm wavelength enabled by reduced-dislocation-density AlGaN templates
Abstract
We fabricated optically pumped and electrically injected ultraviolet (UV) lasers on reduced-threading-dislocation-density (reduced-TDD) AlGaN templates. The overgrowth of sub-micron-wide mesas in the Al0.32Ga0.68N templates enabled a tenfold reduction in TDD, to (2–3) × 108 cm–2. Optical pumping of AlGaN hetero-structures grown on the reduced-TDD templates yielded a low lasing threshold of 34 kW/cm2 at 346 nm. Room-temperature pulsed operation of laser diodes at 353 nm was demonstrated, with a threshold of 22.5 kA/cm2. Furthermore, reduced-TDD templates have been developed across the entire range of AlGaN compositions, presenting a promising approach for extending laser diodes into the deep UV.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1236214
- Report Number(s):
- SAND-2015-9785J
Journal ID: ISSN 1882-0778; 607740
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Express
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 11; Journal ID: ISSN 1882-0778
- Publisher:
- Japan Society of Applied Physics
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Crawford, Mary H., Allerman, Andrew A., Armstrong, Andrew M., Smith, Michael L., and Cross, Karen C. Laser diodes with 353 nm wavelength enabled by reduced-dislocation-density AlGaN templates. United States: N. p., 2015.
Web. doi:10.7567/APEX.8.112702.
Crawford, Mary H., Allerman, Andrew A., Armstrong, Andrew M., Smith, Michael L., & Cross, Karen C. Laser diodes with 353 nm wavelength enabled by reduced-dislocation-density AlGaN templates. United States. https://doi.org/10.7567/APEX.8.112702
Crawford, Mary H., Allerman, Andrew A., Armstrong, Andrew M., Smith, Michael L., and Cross, Karen C. Fri .
"Laser diodes with 353 nm wavelength enabled by reduced-dislocation-density AlGaN templates". United States. https://doi.org/10.7567/APEX.8.112702. https://www.osti.gov/servlets/purl/1236214.
@article{osti_1236214,
title = {Laser diodes with 353 nm wavelength enabled by reduced-dislocation-density AlGaN templates},
author = {Crawford, Mary H. and Allerman, Andrew A. and Armstrong, Andrew M. and Smith, Michael L. and Cross, Karen C.},
abstractNote = {We fabricated optically pumped and electrically injected ultraviolet (UV) lasers on reduced-threading-dislocation-density (reduced-TDD) AlGaN templates. The overgrowth of sub-micron-wide mesas in the Al0.32Ga0.68N templates enabled a tenfold reduction in TDD, to (2–3) × 108 cm–2. Optical pumping of AlGaN hetero-structures grown on the reduced-TDD templates yielded a low lasing threshold of 34 kW/cm2 at 346 nm. Room-temperature pulsed operation of laser diodes at 353 nm was demonstrated, with a threshold of 22.5 kA/cm2. Furthermore, reduced-TDD templates have been developed across the entire range of AlGaN compositions, presenting a promising approach for extending laser diodes into the deep UV.},
doi = {10.7567/APEX.8.112702},
journal = {Applied Physics Express},
number = 11,
volume = 8,
place = {United States},
year = {Fri Oct 30 00:00:00 EDT 2015},
month = {Fri Oct 30 00:00:00 EDT 2015}
}
Web of Science
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