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Room-temperature polarized spin-photon interface based on a semiconductor nanodisk-in-nanopillar structure driven by few defects
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.ORCID iD: 0000-0001-9421-8411
Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.
KTH Royal Inst Technol, Sweden.
KTH Royal Inst Technol, Sweden.
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2018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 3575Article in journal (Refereed) Published
Abstract [en]

Owing to their superior optical properties, semiconductor nanopillars/nanowires in one-dimensional (1D) geometry are building blocks for nano-photonics. They also hold potential for efficient polarized spin-light conversion in future spin nano-photonics. Unfortunately, spin generation in 1D systems so far remains inefficient at room temperature. Here we propose an approach that can significantly enhance the radiative efficiency of the electrons with the desired spin while suppressing that with the unwanted spin, which simultaneously ensures strong spin and light polarization. We demonstrate high optical polarization of 20%, inferring high electron spin polarization up to 60% at room temperature in a 1D system based on a GaNAs nanodisk-in-GaAs nanopillar structure, facilitated by spin-dependent recombination via merely 2-3 defects in each nanodisk. Our approach points to a promising direction for realization of an interface for efficient spin-photon quantum information transfer at room temperature-a key element for future spin-photonic applications.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2018. Vol. 9, article id 3575
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-151480DOI: 10.1038/s41467-018-06035-1ISI: 000443466700015PubMedID: 30177701OAI: oai:DiVA.org:liu-151480DiVA, id: diva2:1250666
Note

Funding Agencies|Linkoping University; KTH; Swedish Research Council [2016-05091, 349-2007-8664]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]; Swedish Energy Agency [P40119-1]

Available from: 2018-09-24 Created: 2018-09-24 Last updated: 2019-06-28

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