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Optical Study of Sub-10 nm In0.3Ga0.7N Quantum Nanodisks in GaN Nanopillars
WPI-Advanced Institute for Material Research, Tohoku University, Sendai , Japan.
Kitami Institute of Technology, Kitami, Japan.
Linköping University, Department of Physics, Chemistry and Biology, Functional Electronic Materials. Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering. Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.
Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.
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2017 (English)In: ACS Photonics, ISSN 2330-4022, Vol. 4, no 7, 1851-1857 p.Article in journal (Refereed) Published
Abstract [en]

We have demonstrated the fabrication of homogeneously distributed In0.3Ga0.7N/GaN quantum nanodisks (QNDs) with a high density and average diameter of 10 nm or less in 30-nm-high nanopillars. The scalable top-down nanofabrication process used biotemplates that were spin-coated on an In0.3Ga0.7N/GaN single quantum well (SQW) followed by low-damage dry etching on ferritins with 7 nm diameter iron cores. The photoluminescence measurements at 70 K showed a blue shift of quantum energy of 420 meV from the In0.3Ga0.7N/GaN SQW to the QND. The internal quantum efficiency of the In0.3Ga0.7N/GaN QND was 100 times that of the SQW. A significant reduction in the quantum-confined Stark effect in the QND structure was observed, which concurred with the numerical simulation using a 3D Schrödinger equation. These results pave the way for the fabrication of large-scale III–N quantum devices using nanoprocessing, which is vital for optoelectronic communication devices.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 4, no 7, 1851-1857 p.
Keyword [en]
III−N compound semiconductor; photoluminescence; quantum nanodisk
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-140636DOI: 10.1021/acsphotonics.7b00460ISI: 000406174600037Scopus ID: 2-s2.0-85025079699OAI: oai:DiVA.org:liu-140636DiVA: diva2:1138528
Available from: 2017-09-05 Created: 2017-09-05 Last updated: 2017-09-14Bibliographically approved

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CiteExportLink to record
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