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Optical Cavity Based on GaN Planar Nanowires Grown by Selective Area Metal-Organic Vapor Phase Epitaxy
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-9840-7364
ITMO Univ, Russia.
Ioffe Inst, Russia; RAS, Russia.
ITMO Univ, Russia; Ioffe Inst, Russia; St Petersburg Acad Univ, Russia.
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2019 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 256, no 6, article id 1800631Article in journal (Refereed) Published
Abstract [en]

GaN planar nanowires (NWs) are fabricated by selective area metal-organic vapor phase epitaxy using focused ion beam etching of trench pattern in the Si3N4 mask. Two crystallographic orientations of NWs along [1120] and [1010] directions are investigated. The coherent growth is confirmed for both directions; however, the best morphology, crystalline and optical properties are found in the GaN planar NWs fabricated along the [1010] axis. Cathodoluminescence (CL) at 5K reveals a presence of Fabry-Perot modes in the region of 1.8-2.5 eV for the NWs fabricated in the [1010] direction. The position and intensity of the Fabry-Perot peaks vary depending on measured point within the NW, which is explained by the model based on the Purcell coefficient calculations. It is shown that small fluctuations in the NW thickness cause a noticeable shift of the Fabry-Perot modes energies, while the enhancement or reduction of the emission intensity for the Fabry-Perot peaks depend on the position of the emitter inside the planar NW.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2019. Vol. 256, no 6, article id 1800631
Keywords [en]
Fabry-Perot modes; GaN; optical cavity; planar nanowires; Purcell coefficient
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-158977DOI: 10.1002/pssb.201800631ISI: 000473612400036OAI: oai:DiVA.org:liu-158977DiVA, id: diva2:1338130
Note

Funding Agencies|Russian Science foundation [16-12-10503]; Swedish Energy Agency

Available from: 2019-07-19 Created: 2019-07-19 Last updated: 2019-07-19

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