Electromagnetically induced transparency for a double Fano-profile system

Abstract

Abstract.A Λ-like model of atomic levels involving two auto-ionizing states is considered. The levels are irradiated by two external electromagnetic fields, a strong driving and a weak probing ones. The analytical formula for medium susceptibility shows an additional electromagnetically induced transparency window caused by the second auto-ionizing level. Characteristics of both transparency windows are analyzed depending on parameters of auto-ionizing levels and the external driving field. Manipulation of these characteristics seems to be very effective because of their large sensitivity with respect to the parameters involved in the problem. This manipulation becomes even more feasible when considered model is implemented in so-called laser-induced continuum structure.

Optical properties of an inhomogeneously broadened multilevel V-system in the weak and strong probe regimes

“…But many studies of EIT have already been done by considering the upper excited states as a structured continuum (i.e. presence of an auto-ionizing (AI) state) [35,36,37,38]. van Enk et al have first discussed the model of a Λ-system in which upper excited states are replaced by a flat continuum [35].…”

“…It has been shown that optical properties of an Λ-atomic medium change significantly in which upper excited state is replaced by a structured continuum including AI resonances [36]. Quite recently, Dinh et al have studied that the occurrence of an additional EIT window is due to the presence of second AI state [38].…”

Long-time joint spectra and entanglement of two photoelectrons originating in interacting auto-ionization systems

“…The presence of auto-ionizing states influences considerably many physical effects. For example, autoionization systems have been investigated as media exhibiting electromagnetically-induced transparency [19,20,21]. They have also been applied for slowing down the light propagating through the medium with auto-ionizing states [20].…”

Long-time joint spectra and entanglement of two photoelectrons originating in interacting auto-ionization systems

“…The presence of auto-ionizing states considerably influences many physical effects. For example, auto-ionization systems have been investigated as media exhibiting electromagnetically-induced transparency [19][20][21]. They have also been applied for slowing down the light propagating through the medium with auto-ionizing states [20].…”