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Low-loss telecom-band nanofiber cavity for interfacing Yb atomic qubits.
Optics Letters
|August 29, 2025
Summary
Researchers developed a new method for fabricating optical nanofiber cavities for efficient interfacing with ytterbium atoms. This technique enables low-loss cavities for quantum communication and computing applications.
Area of Science:
- Quantum Optics
- Materials Science
- Nanotechnology
Background:
- Optical cavities are crucial for atom-photon interactions.
- Conventional fabrication methods suffer from absorption losses.
- Ytterbium atoms are promising for quantum applications.
Purpose of the Study:
- To develop a low-loss optical nanofiber cavity for efficient interfacing with ytterbium atoms.
- To utilize a modified heat-and-pull method for nanofiber fabrication.
- To enable atom-photon coupling at telecom-wavelength transitions.
Main Methods:
- Fabrication of an optical nanofiber cavity using a deuterium-oxygen flame in the heat-and-pull method.
- Suppression of hydroxyl-induced absorption losses.
- Characterization of the nanofiber cavity's optical properties.
Main Results:
- Achieved an optical nanofiber cavity with an intrinsic round-trip loss of 0.31(2)%.
- Obtained a cavity finesse of 2.0(1)×10^3.
- Projected cooperativity of 90 for interfacing with ytterbium atoms.
Conclusions:
- The developed technique enables practical fabrication of fiber-integrated atom-photon interfaces in the telecom band.
- This advancement is critical for scalable quantum communication and distributed quantum computing.
- The low-loss nanofiber cavity is well-suited for efficient atom-photon coupling.
