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Nonlinear behavior of the emission in the periodic structure of InAs monolayers embedded in a GaAs matrix
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0002-9840-7364
St Petersburg Academic University, Russia; Russian Academic Science, Russia; ITMO University, Russia.
St Petersburg Academic University, Russia; Russian Academic Science, Russia.
St Petersburg Academic University, Russia; Russian Academic Science, Russia.
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2017 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 254, no 4, UNSP 1600402Article in journal (Refereed) Published
Abstract [en]

We report time-resolved photoluminescence (TRPL) measurements performed at different temperatures for the Bragg structure containing 60 InAs monolayer-based quantum wells (QWs) periodically arranged in a GaAs matrix. TRPL data reveal an appearance of the additional superradiant (SR) mode originated from coherent collective interaction of QWs. The SR mode is not manifested in the case if a small number of QWs is excited, then only an exciton emission related to the InAs QWs dominates the PL spectrum. The SR mode demonstrates a superlinear dependence of the intensity and radiative decay rate on the excitation power and its intensity increases at elevated temperatures compared to the excitonic emission. The photoluminescence delay time is much shorter for the SR mode indicating that the relaxation of hot excitons can occur via stimulated scattering processes. The specific behavior of the SR emission can have a strong potential for different applications such as optical logic devices, superluminescent diodes, optical switches, and low-threshold lasers. Time-resolved photoluminescence image at low temperature for the Bragg structure consisting of InAs monolayer-based quantum wells (inset).

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2017. Vol. 254, no 4, UNSP 1600402
Keyword [en]
coherent interaction; GaAs matrix; InAs; quantum wells; time-resolved photoluminescence
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-137095DOI: 10.1002/pssb.201600402ISI: 000398824000010OAI: oai:DiVA.org:liu-137095DiVA: diva2:1093244
Conference
International Conference on Terahertz Emission, Metamaterials and Nanophotonics (TERAMETANANO)
Note

Funding Agencies|Russian Science Foundation [16-12-10503]; Swedish Research Council (VR); Swedish Government Strategic Research Area in Materials Science on Functional Materials (AFM); FP7 IRSES HyMeCav; FP7 ITN NOTEDEV

Available from: 2017-05-05 Created: 2017-05-05 Last updated: 2017-05-05

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CiteExportLink to record
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Citation style
  • apa
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