Optical-mode hyperconversion in the bad-cavity regime

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.

Automated summary

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.