Hyperradiance by a stream of phase-correlated atomic dipole pairs traversing a high-Q cavity

• Published in: Scientific reports Vol. 11; no. 1; p. 11256
• Main Authors: Han, Junseok, Kim, Jinuk, Oh, Seung-hoon, Son, Gibeom, Ha, Junseo, An, Kyungwon
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 27.05.2021; Nature Portfolio
• Subjects: 639/624/400/482; 639/766/36/1121; Humanities and Social Sciences; multidisciplinary; Science; Science (multidisciplinary)
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-021-90669-7

Hyperradiance in which radiation rate exceeds that of superradiance has been theoretically investigated in various coherently-coupled emitter-field systems. In most cases, either proposed setups were experimentally challenging or the mean photon number in a cavity was limited. In this paper, with numerical simulations and analytic calculations, we demonstrate that significant hyperradiance with a large mean photon number can occur in a microlaser system, where pairs of two-level atoms prepared in quantum superposition states traverse a high- Q cavity in the presence of a pump field intersecting the cavity mode. Hyperradiance is induced when the intracavity-pump Rabi frequency is out of phase with respect to the atom-cavity coupling so that the reduction of atomic polarization by the atom-cavity coupling is compensated by the pump Rabi frequency in the steady state to maximize atomic photoemission.