Quantum Research Institute | Cavity QED with molecular defects coupled to a photonic crystal cavity
Jonathan Hood (Purdue University)
Thursday, October 23, 2025
11:00 AM-12:00 PM
Virtual
In-person: Michigan League - Henderson room (3rd Floor)
Zoom: https://umich.zoom.us/j/95387296886?jst=2
Abstract:
We implement permanent spectral tuning to bring lifetime-limited emitters into collective resonance within an integrated photonic cavity. This addresses a fundamental challenge in solid-state cavity QED: combining multiple coherent quantum emitters with scalable nanophotonics. Our hybrid approach decouples emitter synthesis from nanophotonic fabrication using straightforward techniques that make cavity QED broadly accessible. Building on our previous demonstration of superradiance and subradiance in pairs of molecules [1], we now couple several coherent emitters to a single cavity mode through high doping densities. Optically-induced frequency shifting provides long-lived spectral control, allowing us to tune multiple molecules into resonance and demonstrate controlled formation of collective quantum states [2]. This establishes a scalable platform for many-body cavity QED and opens pathways toward chemically-designed quantum systems where optical properties are engineered through synthetic chemistry. We will also report on progress in our ultracold Li-Cs experiment, including cooling with the narrow 5D transition [3].
[1] C. Lange, E. Daggett, V. Walther, L. Huang, and J.D. Hood, Nature Physics (2024)
[2] C. Lange et al., arXiv:2406.01917 (2025)
[3] Blodgett et al., arXiv :2505.10540 (2025)
Bio:
Zoom: https://umich.zoom.us/j/95387296886?jst=2
Abstract:
We implement permanent spectral tuning to bring lifetime-limited emitters into collective resonance within an integrated photonic cavity. This addresses a fundamental challenge in solid-state cavity QED: combining multiple coherent quantum emitters with scalable nanophotonics. Our hybrid approach decouples emitter synthesis from nanophotonic fabrication using straightforward techniques that make cavity QED broadly accessible. Building on our previous demonstration of superradiance and subradiance in pairs of molecules [1], we now couple several coherent emitters to a single cavity mode through high doping densities. Optically-induced frequency shifting provides long-lived spectral control, allowing us to tune multiple molecules into resonance and demonstrate controlled formation of collective quantum states [2]. This establishes a scalable platform for many-body cavity QED and opens pathways toward chemically-designed quantum systems where optical properties are engineered through synthetic chemistry. We will also report on progress in our ultracold Li-Cs experiment, including cooling with the narrow 5D transition [3].
[1] C. Lange, E. Daggett, V. Walther, L. Huang, and J.D. Hood, Nature Physics (2024)
[2] C. Lange et al., arXiv:2406.01917 (2025)
[3] Blodgett et al., arXiv :2505.10540 (2025)
Bio:
| Building: | Michigan League |
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| Event Link: | |
| Event Type: | Workshop / Seminar |
| Tags: | Astronomy, Chemistry, Computer Science And Engineering, Electrical And Computer Engineering, Electrical Engineering And Computer Science, Physics, Quantum, Quantum Computing, Quantum Science |
| Source: | Happening @ Michigan from Quantum Research Institute, Department of Astronomy, Department of Physics, Electrical and Computer Engineering, Computer Science and Engineering Division, Applied Physics, Department of Chemistry, Materials Science and Engineering, Electrical Engineering and Computer Science, Quantum Research Institute |
