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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
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Strong Coupling between a Trapped Single Atom and an All-Fiber Cavity
1Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan.
Physical Review Letters
|September 16, 2015
Summary
We achieved strong coupling between a single atom and light using an all-fiber cavity. This demonstrates a new system for cavity quantum electrodynamics, showing clear vacuum Rabi splitting.
Area of Science:
- Quantum optics
- Atomic physics
- Nanophotonics
Background:
- Cavity quantum electrodynamics (CQED) explores light-matter interactions.
- Achieving strong coupling is crucial for quantum technologies.
- All-fiber systems offer robust platforms for quantum experiments.
Purpose of the Study:
- To demonstrate an all-fiber CQED system.
- To achieve strong coupling between a single atom and photons.
- To observe vacuum Rabi splitting in this system.
Main Methods:
- Fabrication of a nanofiber Fabry-Perot cavity using an optical nanofiber and fiber-Bragg-grating mirrors.
- Trapping a single atom in a state-insensitive optical nanofiber trap.
- Measuring the cavity transmission spectrum to observe light-atom interactions.
Main Results:
- Successful implementation of an all-fiber CQED system.
- Observation of the strong coupling regime.
- Clear evidence of vacuum Rabi splitting in the cavity transmission spectrum.
Conclusions:
- The demonstrated all-fiber system enables strong coupling in CQED.
- This work paves the way for advanced quantum information processing and sensing.
- Fiber-based CQED systems are promising for scalable quantum technologies.
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