Year: 2005
Type: article
Abstract: We have investigated the optical response of superradiant atoms, which undergoes three different damping mechanisms: radiative dissipation ($γ_r$), dephasing ($γ_d$), and nonradiative dissipation ($γ_n$). Whereas the roles of $γ_d$ and $γ_n$ are equivalent in the linear susceptibility, the third-order nonlinear susceptibility drastically depends on the ratio of $γ_d$ and $γ_n$: When $γ_d \ll γ_n$, the third-order susceptibility is essentially that of a single atom. Contrarily, in the opposite case of $γ_d \gg γ_n$, the third-order susceptibility suffers the size-enhancement effect and becomes proportional to the system size.
DOI: 10.1143/jpsj.74.2921
Authors: Kazuki Koshino, Hajime Ishihara
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2038488755