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Title: Nonpolar InGaN/GaN core–shell single nanowire lasers

We report lasing from nonpolar p-i-n InGaN/GaN multi-quantum well core–shell single-nanowire lasers by optical pumping at room temperature. The nanowire lasers were fabricated using a hybrid approach consisting of a top-down two-step etch process followed by a bottom-up regrowth process, enabling precise geometrical control and high material gain and optical confinement. The modal gain spectra and the gain curves of the core–shell nanowire lasers were measured using micro-photoluminescence and analyzed using the Hakki-Paoli method. Significantly lower lasing thresholds due to high optical gain were measured compared to previously reported semipolar InGaN/GaN core–shell nanowires, despite significantly shorter cavity lengths and reduced active region volume. Mode simulations show that due to the core–shell architecture, annular-shaped modes have higher optical confinement than solid transverse modes. Furthermore, the results show the viability of this p-i-n nonpolar core–shell nanowire architecture, previously investigated for next-generation light-emitting diodes, as low-threshold, coherent UV–visible nanoscale light emitters, and open a route toward monolithic, integrable, electrically injected single-nanowire lasers operating at room temperature.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1] ; ORCiD logo [2]
  1. Univ. of New Mexico, Albuquerque, NM (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Report Number(s):
SAND-2017-1645J
Journal ID: ISSN 1530-6984; 654144
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 17; Journal Issue: 2; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Energy Frontier Research Centers (EFRC) (United States). EFRC for Solid State Lighting Science (SSLS)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE; core−shell; GaN; InGaN; laser; nanowire; nonpolar
OSTI Identifier:
1369452

Li, Changyi, Wright, Jeremy Benjamin, Liu, Sheng, Lu, Ping, Figiel, Jeffrey J., Leung, Benjamin, Chow, Weng W., Brener, Igal, Koleske, Daniel D., Luk, Ting -Shan, Feezell, Daniel F., Brueck, S. R. J., and Wang, George T.. Nonpolar InGaN/GaN core–shell single nanowire lasers. United States: N. p., Web. doi:10.1021/acs.nanolett.6b04483.
Li, Changyi, Wright, Jeremy Benjamin, Liu, Sheng, Lu, Ping, Figiel, Jeffrey J., Leung, Benjamin, Chow, Weng W., Brener, Igal, Koleske, Daniel D., Luk, Ting -Shan, Feezell, Daniel F., Brueck, S. R. J., & Wang, George T.. Nonpolar InGaN/GaN core–shell single nanowire lasers. United States. doi:10.1021/acs.nanolett.6b04483.
Li, Changyi, Wright, Jeremy Benjamin, Liu, Sheng, Lu, Ping, Figiel, Jeffrey J., Leung, Benjamin, Chow, Weng W., Brener, Igal, Koleske, Daniel D., Luk, Ting -Shan, Feezell, Daniel F., Brueck, S. R. J., and Wang, George T.. 2017. "Nonpolar InGaN/GaN core–shell single nanowire lasers". United States. doi:10.1021/acs.nanolett.6b04483. https://www.osti.gov/servlets/purl/1369452.
@article{osti_1369452,
title = {Nonpolar InGaN/GaN core–shell single nanowire lasers},
author = {Li, Changyi and Wright, Jeremy Benjamin and Liu, Sheng and Lu, Ping and Figiel, Jeffrey J. and Leung, Benjamin and Chow, Weng W. and Brener, Igal and Koleske, Daniel D. and Luk, Ting -Shan and Feezell, Daniel F. and Brueck, S. R. J. and Wang, George T.},
abstractNote = {We report lasing from nonpolar p-i-n InGaN/GaN multi-quantum well core–shell single-nanowire lasers by optical pumping at room temperature. The nanowire lasers were fabricated using a hybrid approach consisting of a top-down two-step etch process followed by a bottom-up regrowth process, enabling precise geometrical control and high material gain and optical confinement. The modal gain spectra and the gain curves of the core–shell nanowire lasers were measured using micro-photoluminescence and analyzed using the Hakki-Paoli method. Significantly lower lasing thresholds due to high optical gain were measured compared to previously reported semipolar InGaN/GaN core–shell nanowires, despite significantly shorter cavity lengths and reduced active region volume. Mode simulations show that due to the core–shell architecture, annular-shaped modes have higher optical confinement than solid transverse modes. Furthermore, the results show the viability of this p-i-n nonpolar core–shell nanowire architecture, previously investigated for next-generation light-emitting diodes, as low-threshold, coherent UV–visible nanoscale light emitters, and open a route toward monolithic, integrable, electrically injected single-nanowire lasers operating at room temperature.},
doi = {10.1021/acs.nanolett.6b04483},
journal = {Nano Letters},
number = 2,
volume = 17,
place = {United States},
year = {2017},
month = {1}
}