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Room-temperature polarized spin-photon interface based on a semiconductor nanodisk-in-nanopillar structure driven by few defects
Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden..
Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden..
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics.
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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
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URN: urn:nbn:se:kth:diva-235108DOI: 10.1038/s41467-018-06035-1ISI: 000443466700015PubMedID: 30177701Scopus ID: 2-s2.0-85052744081OAI: oai:DiVA.org:kth-235108DiVA, id: diva2:1249533
Funder
Swedish Research Council, 2016-05091 349-2007-8664Swedish Energy Agency, P40119-1
Note

QC 20180919

Available from: 2018-09-19 Created: 2018-09-19 Last updated: 2018-09-19Bibliographically approved

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