Direct generation of linearly polarized single photons with a deterministic axis in quantum dots

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dc.contributor.authorWang, Tong
dc.contributor.authorPuchtler, Tim J.
dc.contributor.authorPatra, Saroj K.
dc.contributor.authorZhu, Tongtong
dc.contributor.authorAli, Muhammad
dc.contributor.authorBadcock, Tom J.
dc.contributor.authorDing, Tao
dc.contributor.authorOliver, Rachel A.
dc.contributor.authorSchulz, Stefan
dc.contributor.authorTaylor, Robert A.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderEngineering and Physical Sciences Research Councilen
dc.date.accessioned2017-09-19T15:24:06Z
dc.date.available2017-09-19T15:24:06Z
dc.date.issued2017-07-21
dc.date.updated2017-09-19T15:08:15Z
dc.description.abstractWe report the direct generation of linearly polarized single photons with a deterministic polarization axis in self-assembled quantum dots (QDs), achieved by the use of non-polar InGaN without complex device geometry engineering. Here, we present a comprehensive investigation of the polarization properties of these QDs and their origin with statistically significant experimental data and rigorous k·p modeling. The experimental study of 180 individual QDs allows us to compute an average polarization degree of 0.90, with a standard deviation of only 0.08. When coupled with theoretical insights, we show that these QDs are highly insensitive to size differences, shape anisotropies, and material content variations. Furthermore, 91% of the studied QDs exhibit a polarization axis along the crystal [1–100] axis, with the other 9% polarized orthogonal to this direction. These features give non-polar InGaN QDs unique advantages in polarization control over other materials, such as conventional polar nitride, InAs, or CdSe QDs. Hence, the ability to generate single photons with polarization control makes non-polar InGaN QDs highly attractive for quantum cryptography protocols.en
dc.description.sponsorshipUK Engineering and Physical Sciences Research Council (EPSRC Grants EP/M012379/1 and EP/M011682/1); Science Foundation Ireland (SFI Project No. 13/SIRG/2210)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationWang, T., Puchtler, T. J., Patra, S. K., Zhu, T., Ali, M., Badcock, T. J., Ding, T., Oliver, R. A., Schulz, S. and Taylor, R. A. (2017) 'Direct generation of linearly polarized single photons with a deterministic axis in quantum dots'. Nanophotonics, 6 (5), pp. 1175-1183. doi:10.1515/nanoph-2017-0027en
dc.identifier.doi10.1515/nanoph-2017-0027
dc.identifier.endpage1183en
dc.identifier.issn2192-8606
dc.identifier.issued5en
dc.identifier.journaltitleNanophotonicsen
dc.identifier.startpage1175en
dc.identifier.urihttps://hdl.handle.net/10468/4710
dc.identifier.volume6en
dc.language.isoenen
dc.publisherDe Gruyter Openen
dc.rights©2017, Tong Wang and Saroj K. Patra et al., published by De Gruyter. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 Licenseen
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjecta-plane InGaNen
dc.subjectDeterministic polarization axisen
dc.subjectLinearly polarized single photonen
dc.subjectQuantum dotsen
dc.subjectk p theoryen
dc.subject~Tyndall National Institute - Journal Articles~en
dc.subject~Electrical and Electronic Engineering - Journal Articles~en
dc.titleDirect generation of linearly polarized single photons with a deterministic axis in quantum dotsen
dc.typeArticle (peer-reviewed)en
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