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Stark tuning and electrical charge state control of single divacancies in silicon carbide
University of Chicago, IL 60637 USA.
University of Chicago, IL 60637 USA.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, Faculty of Science & Engineering.
National Institute Quantum and Radiol Science and Technology, Japan.
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, no 26, article id 262403Article in journal (Refereed) Published
Abstract [en]

Neutrally charged divacancies in silicon carbide (SiC) are paramagnetic color centers whose long coherence times and near-telecom operating wavelengths make them promising for scalable quantum communication technologies compatible with existing fiber optic networks. However, local strain inhomogeneity can randomly perturb their optical transition frequencies, which degrades the indistinguishability of photons emitted from separate defects and hinders their coupling to optical cavities. Here, we show that electric fields can be used to tune the optical transition frequencies of single neutral divacancy defects in 4H-SiC over a range of several GHz via the DC Stark effect. The same technique can also control the charge state of the defect on microsecond timescales, which we use to stabilize unstable or non-neutral divacancies into their neutral charge state. Using fluorescence-based charge state detection, we show that both 975 nm and 1130 nm excitation can prepare their neutral charge state with near unity efficiency. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons. org/licenses/by/4.0/).

Place, publisher, year, edition, pages
AMER INST PHYSICS , 2017. Vol. 111, no 26, article id 262403
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Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:liu:diva-144264DOI: 10.1063/1.5004174ISI: 000418947200021OAI: oai:DiVA.org:liu-144264DiVA, id: diva2:1173626
Note

Funding Agencies|ARL OSD QSEP program; NSF EFRI [1641099]; AFOSR MURI program; JSPS KAKENHI(A) [17H01056]; Swedish Research Council [2016-04068]; Carl-Trygger Stiftelse for Vetenskaplig Forskning [CTS 15:339]; Swedish Energy Agency [43611-1]

Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-01-29

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