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Superradiant and Subradiant Cavity Scattering by Atom Arrays
Zhenjie Yan1,2, Jacquelyn Ho1,2, Yue-Hui Lu1,2
1Department of Physics, University of California, Berkeley, California 94720, USA.
Physical Review Letters
|January 5, 2024
Summary
We demonstrate how arrays of trapped rubidium-87 atoms in an optical cavity can control light scattering. Atom arrangement precisely tunes collective enhancement and suppression, impacting cavity light intensity and resonance properties.
Area of Science:
- Quantum optics
- Atomic physics
- Cavity quantum electrodynamics
Background:
- Collective light-matter interactions are crucial in quantum optics.
- Optical cavities enhance light-atom interactions.
- Tweezer arrays offer precise control over atomic positions.
Purpose of the Study:
- To investigate collective enhancement and suppression of light scattering by atom arrays in an optical cavity.
- To explore the influence of atomic arrangement on light-matter interactions.
- To demonstrate control over cavity quantum electrodynamics (QED) in the single- to many-body regimes.
Main Methods:
- Utilizing an array of tweezer-trapped Rubidium-87 atoms within a strongly coupled Fabry-Pérot optical cavity.
- Illuminating the atom array with light transverse to the cavity axis in the low saturation regime.
- Detecting scattered photons within the cavity and analyzing the polarization of emitted light.
Main Results:
- Observed N^2 scaling of cavity photon number for integer-wavelength spacing, indicating collective enhancement.
- Demonstrated nonmonotonic, subradiant cavity intensity for half-integer-wavelength spacing due to destructive interference.
- Showcased collective enhancement or suppression of Rayleigh scattering relative to Raman scattering.
- Tuned atom-induced shifts and broadenings of cavity resonance by varying atom number and positions.
Conclusions:
- Tweezer arrays provide precise control over light scattering in optical cavities.
- Atomic arrangement dictates collective quantum phenomena, enabling tunable light-matter interactions.
- This work extends control in atomic cavity QED from single atoms to many-body systems.
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