Journal
PHOTONICS RESEARCH
Volume 9, Issue 7, Pages 1226-1233Publisher
CHINESE LASER PRESS
DOI: 10.1364/PRJ.419275
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Funding
- National Natural Science Foundation of China [11804409, 11874433, 11874434, 12025509]
- National Key Research and Development Program of China [2018YFA0307500]
- Fundamental Research Funds for the Central Universities [18lgpy80]
- Key-Area Research and Development Program of Guangdong Province [2019B030330001]
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An experimental proposal is presented to achieve strong photon blockade using electromagnetically induced transparency (EIT) with a single alkaline-earth-metal atom trapped in an optical cavity. By exploiting the interplay between the Stark shift and control field, the system achieves optimal second-order correlation function and high cavity transmission at the atomic quasi-dark-state resonance. This new strategy opens up avenues for engineering nonclassical quantum states in cavity quantum electrodynamics.
We present an experimental proposal to achieve a strong photon blockade by employing electromagnetically induced transparency (EIT) with a single alkaline-earth-metal atom trapped in an optical cavity. In the presence of optical Stark shift, both the second-order correlation function and cavity transmission exhibit asymmetric structures between the red and blue sidebands of the cavity. For a weak control field, the photon quantum statistics for the coherent transparency window (i.e., atomic quasi-dark-state resonance) are insensitive to the Stark shift, which should also be immune to the spontaneous emission of the excited state by taking advantage of the intrinsic dark-state polariton of EIT. Interestingly, by exploiting the interplay between the Stark shift and control field, the strong photon blockade at atomic quasi-dark-state resonance has an optimal second-order correlation function g((2)) (0)similar to 10(-4) and a high cavity transmission simultaneously. The underlying physical mechanism is ascribed to the Stark shift enhanced spectrum anharmonicity and the EIT hosted strong nonlinearity with loss-insensitive atomic quasi-dark-state resonance, which is essentially different from the conventional proposal with emerging Kerr nonlinearity in cavity-EIT. Our results reveal a new strategy to realize high-quality single photon sources, which could open up a new avenue for engineering nonclassical quantum states in cavity quantum electrodynamics. (C) 2021 Chinese Laser Press
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