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Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network
Scaling-down the size of semiconductor cavity lasers and engineering their electromagnetic environment in the Purcell regime can bring about spectacular advance in nanodevices fabrication. We report here an unprecedented observation of a coherent Cathodoluminescence from GaN nanocavities (20–100 nm)...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8087758/ https://www.ncbi.nlm.nih.gov/pubmed/33931668 http://dx.doi.org/10.1038/s41598-021-88660-3 |
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author | Shamoon, Danish Upadhyaya, Kishor Shivaprasad, Sonnada M. |
author_facet | Shamoon, Danish Upadhyaya, Kishor Shivaprasad, Sonnada M. |
author_sort | Shamoon, Danish |
collection | PubMed |
description | Scaling-down the size of semiconductor cavity lasers and engineering their electromagnetic environment in the Purcell regime can bring about spectacular advance in nanodevices fabrication. We report here an unprecedented observation of a coherent Cathodoluminescence from GaN nanocavities (20–100 nm). Incident lower energy (< 15 kV) electron beams excite the band edge UV emission from the walls of the network whereas for higher energies, the emitted photons are spontaneously down converted into NIR and preferentially emerge from the nanocavities. Non-centrosymmetric structure of GaN and its nanowall geometry together facilitate this unique observation which is substantiated by our numerical results. At cryogenic temperatures, an intense and narrow laser-like NIR beam emanates out of the nanocavities. The work promises the possibility of fabrication of very high density (over 10(8)/cm(2)) cavity lasers that are addressable by simple deflection and tuning of incident electron beams. |
format | Online Article Text |
id | pubmed-8087758 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-80877582021-05-03 Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network Shamoon, Danish Upadhyaya, Kishor Shivaprasad, Sonnada M. Sci Rep Article Scaling-down the size of semiconductor cavity lasers and engineering their electromagnetic environment in the Purcell regime can bring about spectacular advance in nanodevices fabrication. We report here an unprecedented observation of a coherent Cathodoluminescence from GaN nanocavities (20–100 nm). Incident lower energy (< 15 kV) electron beams excite the band edge UV emission from the walls of the network whereas for higher energies, the emitted photons are spontaneously down converted into NIR and preferentially emerge from the nanocavities. Non-centrosymmetric structure of GaN and its nanowall geometry together facilitate this unique observation which is substantiated by our numerical results. At cryogenic temperatures, an intense and narrow laser-like NIR beam emanates out of the nanocavities. The work promises the possibility of fabrication of very high density (over 10(8)/cm(2)) cavity lasers that are addressable by simple deflection and tuning of incident electron beams. Nature Publishing Group UK 2021-04-30 /pmc/articles/PMC8087758/ /pubmed/33931668 http://dx.doi.org/10.1038/s41598-021-88660-3 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Shamoon, Danish Upadhyaya, Kishor Shivaprasad, Sonnada M. Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title | Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title_full | Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title_fullStr | Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title_full_unstemmed | Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title_short | Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network |
title_sort | observation of monochromatic and coherent luminescence from nanocavities of gan nanowall network |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8087758/ https://www.ncbi.nlm.nih.gov/pubmed/33931668 http://dx.doi.org/10.1038/s41598-021-88660-3 |
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