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Fabry-Perot Microcavity Modes in Single GaP/GaNP Core/Shell Nanowires
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, The Institute of Technology.
Graduate Program of Materials Science and Engineering, La Jolla, CA, USA.
Department of Physics, University of California, La Jolla, CA, USA.
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2015 (English)In: Small, ISSN 1613-6810, E-ISSN 1613-6829, Vol. 11, no 47, 6331-6337 p.Article in journal, Letter (Refereed) Published
Abstract [en]

Semiconductor nanowires (NWs) are attracting increasing interest as nanobuilding blocks for optoelectronics and photonics. A novel material system that is highly suitable for these applications are GaNP NWs. In this article, we show that individual GaP/GaNP core/shell nanowires (NWs) grown by molecular beam epitaxy on Si substrates can act as Fabry-Perot (FP) microcavities. This conclusion is based on results of microphotoluminescence (μ-PL) measurements performed on individual NWs, which reveal periodic undulations of the PL intensity that follow an expected pattern of FP cavity modes. The cavity is concluded to be formed along the NW axis with the end facets acting as reflecting mirrors. The formation of the FP modes is shown to be facilitated by an increasing index contrast with the surrounding media. Spectral dependence of the group refractive index is also determined for the studied NWs. The observation of the FP microcavity modes in the GaP/GaNP core/shell NWs can be considered as a first step toward achieving lasing in this quasidirect bandgap semiconductor in the NW geometry.

Place, publisher, year, edition, pages
Weinheim: Wiley-VCH Verlagsgesellschaft, 2015. Vol. 11, no 47, 6331-6337 p.
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-123979DOI: 10.1002/smll.201501538ISI: 000367916600011PubMedID: 26505738OAI: oai:DiVA.org:liu-123979DiVA: diva2:894787
Note

Funding agencies: Swedish Energy Agency [P40119-1]; U.S. National Science Foundation [DMR-0907652, DMR-1106369]; Royal Government of Thailand Scholarship

Available from: 2016-01-15 Created: 2016-01-15 Last updated: 2016-02-09Bibliographically approved

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ReferencesLink to record
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