Strain Tunable Single-Photon Source Based on a Quantum Dot–Micropillar System

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

  • Author: Moczała-Dusanowska, Magdalena

    University of Würzburg, Germany

  • Author: Dusanowski, Łukasz

    University of Würzburg, Germany

  • Author: Gerhardt, Stefan

    University of Würzburg, Germany

  • Author: He, Yu-Ming

    University of Science and Technology of China, China

  • Author: Reindl, Marcus

    Johannes Kepler University of Linz, Austria

  • Author: Rastelli, Armando

    Johannes Kepler University of Linz, Austria

  • Author: Trotta, Rinaldo

    Johannes Kepler University of Linz, Austria

  • Author: Gregersen, Niels

    Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

  • Author: Höfling, Sven

    University of Würzburg, Germany

  • Author: Schneider, Christian

    University of Würzburg, Germany

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Scalable quantum photonic architectures demand highly efficient, high-purity single-photon sources, which can be frequency matched via external tuning. We demonstrate a single-photon source based on an InAs quantum dot embedded in a micropillar resonator, which is frequency tunable via externally applied stress. Our platform combines the advantages of a micropillar cavity and the piezo-strain-tuning technique enabling single-photon spontaneous emission enhancement via the Purcell effect and wavelength-tunable quantum dots (QDs). Our optomechanical platform has been implemented by integration of semiconductor-based QD–micropillars on a piezoelectric substrate. The fabricated device exhibits spontaneous emission enhancement with a Purcell factor of 4.4 ± 0.7 and allows for a pure triggered single-photon generation with g(2)(0) <0.07 under resonant excitation. A quantum dot emission energy tuning range of 0.75 meV for 27 kV/cm applied to the piezosubstrate has been achieved. Our results pave the way toward the scalable implementation of single-photon quantum photonic technologies using optoelectronic devices.
Original languageEnglish
JournalACS Photonics
Pages (from-to)2025−2031
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Semiconductor quantum dots, Micropillar cavity, Strain tuning, Single-photon source, Resonance fluorescence

ID: 186728148