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Dynamic Strain Modulation of a Nanowire Quantum Dot Compatible with a Thin-Film Lithium Niobate Photonic Platform
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Engineering Sciences (SCI), Applied Physics.
KTH, School of Biotechnology (BIO), Centres, Albanova VinnExcellence Center for Protein Technology, ProNova. KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum and Biophotonics.
Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada..
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2023 (English)In: ACS Photonics, E-ISSN 2330-4022, Vol. 10, no 10, p. 3691-3699Article in journal (Refereed) Published
Abstract [en]

The integration of indistinguishable single photon sources in photonic circuits is a major prerequisite for on-chip quantum applications. Among the various high-quality sources, nanowire quantum dots can be efficiently coupled to optical waveguides because of their preferred emission direction along their growth direction. However, local tuning of the emission properties remains challenging. In this work, we transfer a nanowire quantum dot onto a bulk lithium niobate substrate and show that its emission can be dynamically tuned by acousto-optical coupling with surface acoustic waves. The purity of the single photon source is preserved during the strain modulation. We further demonstrate that the transduction is maintained even with a SiO2 encapsulation layer deposited on top of the nanowire acting as the cladding of a photonic circuit. Based on these experimental findings and numerical simulations, we introduce a device architecture consisting of a nanowire quantum dot efficiently coupled to a thin-film lithium niobate rib waveguide and strain-tunable by surface acoustic waves.

Place, publisher, year, edition, pages
American Chemical Society (ACS) , 2023. Vol. 10, no 10, p. 3691-3699
Keywords [en]
quantum dots, nanowire, single photon source, surface acoustic waves, lithium niobate, integratedphotonics
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-339329DOI: 10.1021/acsphotonics.3c00821ISI: 001083932000001PubMedID: 37869556Scopus ID: 2-s2.0-85174969326OAI: oai:DiVA.org:kth-339329DiVA, id: diva2:1810392
Note

QC 20231107

Available from: 2023-11-07 Created: 2023-11-07 Last updated: 2023-11-07Bibliographically approved

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Descamps, ThomasSchetelat, TanguyGao, JunElshaari, Ali W.Zwiller, Val

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Applied PhysicsAlbanova VinnExcellence Center for Protein Technology, ProNovaQuantum and Biophotonics
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