Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network

Abstract 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 (2...

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Autores principales:	Danish Shamoon, Kishor Upadhyaya, Sonnada M. Shivaprasad
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/af2b8361cd1f4f45b7190ab039accbcc
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spelling	oai:doaj.org-article:af2b8361cd1f4f45b7190ab039accbcc2021-12-02T17:16:05ZObservation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network10.1038/s41598-021-88660-32045-2322https://doaj.org/article/af2b8361cd1f4f45b7190ab039accbcc2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88660-3https://doaj.org/toc/2045-2322Abstract 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 108/cm2) cavity lasers that are addressable by simple deflection and tuning of incident electron beams.Danish ShamoonKishor UpadhyayaSonnada M. ShivaprasadNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Danish Shamoon Kishor Upadhyaya Sonnada M. Shivaprasad Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network
description	Abstract 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 108/cm2) cavity lasers that are addressable by simple deflection and tuning of incident electron beams.
format	article
author	Danish Shamoon Kishor Upadhyaya Sonnada M. Shivaprasad
author_facet	Danish Shamoon Kishor Upadhyaya Sonnada M. Shivaprasad
author_sort	Danish Shamoon
title	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_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_sort	observation of monochromatic and coherent luminescence from nanocavities of gan nanowall network
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/af2b8361cd1f4f45b7190ab039accbcc
work_keys_str_mv	AT danishshamoon observationofmonochromaticandcoherentluminescencefromnanocavitiesofgannanowallnetwork AT kishorupadhyaya observationofmonochromaticandcoherentluminescencefromnanocavitiesofgannanowallnetwork AT sonnadamshivaprasad observationofmonochromaticandcoherentluminescencefromnanocavitiesofgannanowallnetwork
_version_	1718381221257412608

Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network

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