4.6 Article

Optical-mode hyperconversion in the bad-cavity regime

Journal

PHYSICAL REVIEW A
Volume 107, Issue 4, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.107.043705

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In this study, the optical-mode-conversion characteristics in a bimodal cavity coupled to a pair of two-level atoms were explored using realistic experimental parameters. It was found that optical hyperconversion phenomenon from one polarized mode to another can be achieved in the weak-coupling multiatom cavity system, and the parameter ranges for generating optical-mode subconversion, superconversion, and hyperconversion were identified.
The ability to convert photons between different electromagnetic modes with low intensity has the potential application in future information technologies. Here, we explore optical-mode-conversion characteristics in a bimodal cavity coupled to a pair of two-level atoms instead of a single atom using experimentally realistic parameters. In our scheme, the two cavity modes, involving a vertically (V-) polarized mode and a horizontally (H-) polarized mode, are not directly coupled to each other owing to their orthogonal polarizations and the V -polarized mode is coherently excited by an external weak pump laser. Via analytical calculations and numerical simulations, we find that optical hyperconversion phenomenon from the V-polarized mode to the H-polarized mode can be realized in the bad-cavity regime, which is reminiscent of optical hyperradiance introduced in the previous studies. We also provide an approximate analysis which gains deeper understanding into the funda-mental reason behind this behavior. Furthermore, we identify the parameter ranges for generating optical-mode subconversion, superconversion, and hyperconversion. The obtained results will deepen the understanding of mode-conversion micromechanisms in the weak-coupling multiatom cavity architectures.

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