Nonpolar InGaN/GaN Core-Shell Single Nanowire Lasers
| Autor: | Benjamin Leung, Igal Brener, Weng W. Chow, George T. Wang, Sheng Liu, Changyi Li, Jeremy B. Wright, T. S. Luk, Jeffrey J. Figiel, S. R. J. Brueck, Daniel D. Koleske, Ping Lu, Daniel F. Feezell |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Light Nitrogen Surface Properties Nanowire Bioengineering Gallium 02 engineering and technology 01 natural sciences Indium Spectral line law.invention Nanocomposites Core shell Optical pumping Structure-Activity Relationship law 0103 physical sciences Nanotechnology General Materials Science Particle Size 010302 applied physics business.industry Nanowires Mechanical Engineering Lasers General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Hybrid approach Laser Transverse plane Semiconductors Optoelectronics 0210 nano-technology business Lasing threshold |
| Zdroj: | Nano letters. 17(2) |
| ISSN: | 1530-6992 |
| Popis: | 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. 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. |
| Databáze: | OpenAIRE |
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