Abstract
In this paper, we show that Electromagnetically Induced Transparency (EIT) can be realized in mediums with Rydberg excitons. With realistic, reliable parameters which show good agreement with optical and electro-optical experiments, as well as the proper choice of Rydberg exciton states in the Cu2O crystal, we indicate how the EIT can be performed. The calculations show that, due to a large group index, one can expect the slowing down of a light pulse by a factor of about in this medium.
Highlights
In recent times, a lot of attention has been directed at the subject of excitons in bulk crystals due to the experimental observation of the so-called yellow exciton series in Cu2 O, up to a large principal quantum number of n = 25 [1,2,3,4]
The Rydberg excitons are hopefully emerging as a tool for quantum technology due to their unique properties, allowing for easy state selection and strong interaction with applied electromagnetic fields
Their unusual features can be useful for controlling matter–electromagnetic field interactions, which offers a new approach for studying semiconductor systems and provides entirely new long-term perspectives for developing novel devices, which are more robust and compact than atomic systems
Summary
The realization of light slowing or storing and retrieving experiments in crystal with RE could unlock a plethora of dynamical effects, which might be observed in such media These phenomena are based on the electromagnetically induced transparency (EIT), which has various potential applications in Entropy 2020, 22, 177; doi:10.3390/e22020177 www.mdpi.com/journal/entropy. The generic EIT utilizes extraordinary dispersive properties of an atomic medium with three active states in the Λ configuration This phenomenon leads to a significant reduction of absorption of a weak, resonant laser field (probe field) by irradiating the medium with a strong control field, and making an otherwise opaque medium transparent.
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