High Extraction Efficiency Source of Photon Pairs Based on a Quantum Dot Embedded in a Broadband Micropillar Cavity

Laia Ginés, Magdalena Moczała-Dusanowska, David Dlaka, Radim Hošák, Junior R. Gonzales-Ureta, Jaewon Lee, Miroslav JeŽek, Edmund Harbord, Ruth Oulton, Sven Höfling, Andrew B. Young, Christian Schneider, Ana Predojević

Research output: Contribution to journalArticle (Academic Journal)peer-review

12 Citations (Scopus)


The generation of photon pairs in quantum dots is in its nature deterministic. However, efficient extraction of photon pairs from the high index semiconductor material requires engineering of the photonic environment. We report on a micropillar device with 69.4(10)% efficiency that features broadband operation suitable for extraction of photon pairs. Opposing the approaches that rely solely on Purcell enhancement to realize the enhancement of the extraction efficiency, our solution exploits a suppression of the emission into the modes other than the cavity mode. Furthermore, the design of the device can be further optimized to allow for an extraction efficiency of 85%.

Original languageEnglish
Article number033601
JournalPhysical Review Letters
Issue number3
Publication statusPublished - 15 Jul 2022

Bibliographical note

Funding Information:
We acknowledge funding by the DFG within the Projects No. SCHN1376-5.1 and No. PR1749/1-1. We acknowledge financial support by the State of Bavaria. A. P. would like to acknowledge Swedish Research Council and Carl Tryggers Stiftelse. J. R. G. U., R. H., and M. J. are supported by project HYPER-U-P-S (Hyperentanglement from ultra-bright photon pair sources). Project HYPER-U-P-S has received funding from the QuantERA ERA-NET Cofund in Quantum Technologies implemented within the European Unions Horizon 2020 Program. L. G. was supported by the Knut and Alice Wallenberg Foundation [through the Wallenberg Centre for Quantum Technology (WACQT)]. A. Y. acknowledges support from Engineering and Physical Sciences Research Council (EPSRC) one-dimensional quantum emitters and photons for quantum technologies: 1D QED (EP/N003381/1). M. J. would like to acknowledge funding by the MEYS within the Project No. 8C18002 (HYPER-U-P-S) and the Czech Science Foundation within the Project No. 21-18545S.

Publisher Copyright:
© 2022 authors. Published by the American Physical Society.

Structured keywords

  • Photonics and Quantum


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