http://repository.iitr.ac.in/handle/123456789/7952| Title: | 6kW/cm2 UVC laser threshold in optically pumped lasers achieved by controlling point defect formation |
| Authors: | Kirste R. Guo Q. Dycus J.H. Franke A. Mita S. Sarkar, Biplab Reddy P. LeBeau J.M. Collazo R. Sitar Z. |
| Published in: | Applied Physics Express |
| Abstract: | Optically pumped lasing from AlGaN/AlN multiple quantum wells grown on single-crystalline AlN substrates with lasing thresholds as low as 6 kW/cm2 is demonstrated via the reduction of unintentional point defects in the active region and waveguide, which reduces the non-radiative recombination by 2 orders of magnitude. A higher lasing threshold of 11 kW/cm2 is observed for AlGaN barriers, owing to the reduced localization of electrons and holes in the wells. It is shown that for electrically injected UVC laser diodes, AlGaN barriers are essential. © 2018 The Japan Society of Applied Physics. |
| Citation: | Applied Physics Express (2018), 11(8): - |
| URI: | https://doi.org/10.7567/APEX.11.082101 http://repository.iitr.ac.in/handle/123456789/7952 |
| Issue Date: | 2018 |
| Publisher: | Japan Society of Applied Physics |
| ISSN: | 18820778 |
| Author Scopus IDs: | 24450568300 57200500288 56596702800 35731256800 8535369100 57205868869 56985105000 16202825900 6701729383 7004338257 |
| Author Affiliations: | Kirste, R., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States, Adroit Materials, 2054 Kildaire Farm Road, Suite 205, Cary, NC 27518, United States Guo, Q., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Dycus, J.H., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Franke, A., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Mita, S., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States, Adroit Materials, 2054 Kildaire Farm Road, Suite 205, Cary, NC 27518, United States Sarkar, B., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Reddy, P., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States, Adroit Materials, 2054 Kildaire Farm Road, Suite 205, Cary, NC 27518, United States LeBeau, J.M., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Collazo, R., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States Sitar, Z., Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695-7919, United States, Adroit Materials, 2054 Kildaire Farm Road, Suite 205, Cary, NC 27518, United States |
| Funding Details: | Acknowledgments The authors acknowledge partial financial support from ARL (W56KGU-15-C-0052, W56KGU-14-C-0046), NSF (ECCS-1508854, ECCS-1610992, DMR-1508191, ECCS-1653383), and ARO (W911NF-15-2-0068, W911NF-16-C-0101). Part of this work was performed at the Analytical Instrumentation Facility (AIF) of North Carolina State University, which is supported by the State of North Carolina and the National Science Foundation (award number ECCS-1542015). The AIF is a member of the North Carolina Research Triangle Nanotechnology Network (RTNN), which is a site in the National Nanotechnology Coordinated Infrastructure (NNCI). |
| Appears in Collections: | Journal Publications [ECE] |
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