Designs for scalable construction of hybrid quantum photonic cavities
Name
026110_1_5.0242498.pdf
Description
Published version
Size
8.06 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Greenspon, Andrew S
Dong, Mark
Christen, Ian
Gilbert, Gerald
Eichenfield, Matt
Englund, Dirk
Date Issued
April 23, 2025
Journal
APL Quantum
Publisher
AIP Publishing
Citation
Andrew S. Greenspon, Mark Dong, Ian Christen, Gerald Gilbert, Matt Eichenfield, Dirk Englund; Designs for scalable construction of hybrid quantum photonic cavities. APL Quantum 1 June 2025; 2 (2): 026110.
Version
Final published version
Abstract
Nanophotonic resonators are central to numerous applications, from efficient spin–photon interfaces to laser oscillators and precision sensing. A leading approach consists of photonic crystal (PhC) cavities, which have been realized in a wide range of dielectric materials. However, translating proof-of-concept devices into a functional system entails a number of additional challenges, inspiring new approaches that combine resonators with wavelength-scale confinement and high quality factors; scalable integration with integrated circuits and photonic circuits; electrical or mechanical cavity tuning; and, in many cases, a need for heterogeneous integration with functional materials such as III–V semiconductors or diamond color centers for spin–photon interfaces. Here we introduce a concept that generates a finely tunable PhC cavity at a selected wavelength between two heterogeneous optical materials whose properties satisfy the above requirements. The cavity is formed by stamping a hard-to-process material with simple waveguide geometries on top of an easy-to-process material consisting of dielectric grating mirrors and active tuning capability. We simulate our concept for the particularly challenging design problem of multiplexed quantum repeaters based on arrays of cavity-coupled diamond color centers, achieving theoretically calculated unloaded quality factors of 106, mode volumes as small as 1.2(λ/neff)3, and maintaining >60% total on-chip collection efficiency of fluorescent photons. We further introduce a method of low-power piezoelectric tuning of these hybrid diamond cavities, simulating optical resonance shifts up to ∼760 GHz and color center fluorescence tuning of 5 GHz independent of cavity tuning. These results will motivate integrated photonic cavities toward larger scale systems-compatible designs.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution-NonCommercial
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DOI of Published Version
https://doi.org/10.1063/5.0242498
