Magic-wavelength nanofiber-based two-color dipole trap with sub-?/2 spacing

Year: 2025

Authors: Pache L., Cordier M., Letellier H., Schemmer M., Schneeweiss P., Volz J., Rauschenbeutel A.

Autors Affiliation: Humboldt Univ, Dept Phys, D-10099 Berlin, Germany; CNR, Ist Nazl Ottica, I-50019 Sesto Fiorentino, Italy.

Abstract: We report on the realization and characterization of a novel magic-wavelength nanofiber-based two-color optical dipole trap for cesium that allows us to generate two diametral periodic one-dimensional arrays of trapping sites with a spacing significantly smaller than half the resonant free-space wavelength of the cesium D2 transition. This is achieved by launching a blue-detuned partial standing wave and two red-detuned light fields through the nanofiber. We trap and optically interface the atoms in the resulting periodic optical potential and characterize the trap by measuring the lifetime of the trapped atoms, the atom-light coupling strength, the filling factor, and the trap frequencies in the radial and axial directions. The implementation of this nanofiber-based optical interface with magic trapping wavelengths and sub-A/2 spacing is an important step towards the exploration of novel collective radiative effects, such as selective radiance.

Journal/Review: PHYSICAL REVIEW A

Volume: 112 (1)      Pages from: L011701-1  to: L011701-6

More Information: M.C. and M.S. acknowledge support from the European Commission (Marie Sklodowska-Curie IF Grants No. 101029304 and No. 896957) . H.L. acknowledges funding from the European Commission (ERC) Grant No. 101071882. We acknowledge funding from the Alexander von Humboldt Foundation in the framework of the Alexander von Humboldt Professorship endowed by the Federal Ministry of Education and Research, funding from the European Commission under the projects DAALI (No. 899275) and SuperWave (ERC Grant No. 101071882) , and funding from the Einstein Foundation (Einstein Research Unit on Quantum Devices) . We thank Darrick Chang and Daniel Huemmer for insightful discussion and calculations of selective radiance in our nanofiber platform. We thank Christoph Clausen, Christian Liedl, and Sebastian Pucher for developing and improving the trap po-tential calculations.
KeyWords: Atoms
DOI: 10.1103/89l1-dys4

Citations: 2
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