Strain spectrally-tunable single-photon source based on a quantum dot in micro-cavity

Magdalena Moczała-Dusanowska, Łukasz Dusanowski, Stefan Gerhardt, Yu-Ming He, Marcus Reindl, Armando Rastelli, Rinaldo Trotta, Niels Gregersen, S. Höfling, C. Schneider

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Epitaxially grown self-assembled quantum dots (QDs) are promising candidates for an efficient single-photon generation. In order to maximize the number of photons extracted from the device, QDs are frequently embedded into photonic structures such as microcavities. Once the QD is positioned inside an optical cavity, the Purcell effect ensures that light is emitted predominantly into the cavity mode. In this contribution, we demonstrate results of emission tuning of QDs inserted in microcavities. A sample containing an InAs/GaAs QDs embedded in a planar cavity based on Bragg reflectors has been integrated onto the PMN-PT piezo crystal. Subsequently, microcavities have been fabricated by electron-beam lithography and reactive ion etching. The application of external stress produces linear shifts of QDs emission which could be tuned into the resonance with fundamental cavity mode and allow enhancement of QD emission due to the Purcell effect.
Original languageEnglish
Title of host publicationProceedings of SPIE
Number of pages2
PublisherSPIE - International Society for Optical Engineering
Publication statusAccepted/In press - 2021
EventSPIE Photonics West LASE 2020
- The Moscone Center, San Francisco, United States
Duration: 1 Feb 20206 Feb 2020


ConferenceSPIE Photonics West LASE 2020
LocationThe Moscone Center
Country/TerritoryUnited States
CitySan Francisco


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