High Purcell Enhancement in Quantum-Dot Hybrid Circular Bragg Grating Cavities for GHz Clock Rate Generation of Indistinguishable Photons
We present Purcell-enhanced (FP > 25) semiconductor InAs quantum dot decay times of T1 < 30 ps, enabled by deterministic hybrid circular Bragg gratings (hCBGs). We investigate the benefits of these short T1-times on the two-photon indistinguishability for quasi-resonant and strictly resonant excitation and observe visibilities of ≥96% at 12.5 ns time delay of consecutively emitted photons. The strongly Purcell-enhanced decay times enable a high degree of indistinguishability for elevated temperatures of up to 30 K and, moreover, allow for excitation of up to 1.28 GHz repetition rate. Our work highlights the prospects of highly Purcell-enhanced solid-state quantum emitters for applications in quantum information and technologies operating at GHz clock rates.
Authors
- Daniel A. Vajner (ORCID: https://orcid.org/0000-0002-4900-0277)
- Martin von Helversen (ORCID: https://orcid.org/0000-0003-4494-4698)
- Shulun Li (ORCID: https://orcid.org/0000-0001-5894-9436)
- Johannes Schall (ORCID: https://orcid.org/0000-0003-0824-4010)
- Sven Rodt (ORCID: https://orcid.org/0000-0001-6275-4965)
- Lucas Rickert (ORCID: https://orcid.org/0000-0003-0329-5740)
- Tobias Heindel (ORCID: https://orcid.org/0000-0003-1148-404X)
- Stephan Reitzenstein (ORCID: https://orcid.org/0000-0002-1381-9838)
- Hanqing Liu (ORCID: https://orcid.org/0000-0001-7472-2688)
- Zhichuan Niu (ORCID: https://orcid.org/0000-0002-9566-6635)
- Haiqiao Ni
Institutions
- Chinese Academy of Sciences (CN)
- Institute of Semiconductors (CN)
- University of Chinese Academy of Sciences (CN)
- Technische Universität Berlin (DE)
Publication Details
- Journal
- ACS Photonics
- Published
- 2024-12-20
- DOI
- https://doi.org/10.1021/acsphotonics.4c01873
- Citations
- 19
- Primary Topic
- Photonic and Optical Devices
- Type
- article
- Field-Weighted Citation Impact
- 3.96
Funders
- Deutsche Forschungsgemeinschaft
- Bundesministerium für Bildung und Forschung
- Einstein Stiftung Berlin
- Key Technologies Research and Development Program