Brunswick, L.A.F. orcid.org/0000-0001-8157-7255, Hallacy, L., Dost, R. et al. (3 more authors) (2025) Electro-mechanically tunable, waveguide-coupled photonic-crystal cavities with embedded quantum dots. ACS Photonics. ISSN: 2330-4022
Abstract
On-chip microcavities with embedded quantum emitters provide an excellent platform for high-performance quantum technologies. A major difficulty for such devices is overcoming the detrimental effects of fluctuations in the device dimensions caused by the limitations of the fabrication processes. We present a system based on a 1D photonic-crystal cavity with an embedded quantum dot. A microelectromechanical cantilever is used to tune the cavity mode wavelength via index modulation and the quantum-confined Stark effect is used to tune the quantum dot emission energy, thus mitigating the effect of fabrication imperfections. To demonstrate the operation of the device, a maximum voltage-controllable cavity tuning range of Δλ = 1.8 nm is observed. This signal is measured at the end of a bus waveguide which side-couples to the cavity, enabling the coupling of multiple cavities to a common waveguide, a key requirement for scale-up in these systems. Additionally, a quantum dot is tuned into resonance with the cavity mode, exhibiting an enhanced emission rate with a detector-resolution limited Purcell factor of FP = 3.5.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2025 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Keywords: | nanophotonics; Purcell effect; photonic resonators; microelectromechanical systems; quantum optics |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematical and Physical Sciences |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/V026496/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 30 Jul 2025 15:16 |
Last Modified: | 30 Jul 2025 15:16 |
Status: | Published online |
Publisher: | American Chemical Society (ACS) |
Refereed: | Yes |
Identification Number: | 10.1021/acsphotonics.5c00606 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:229806 |