Work

Tunable superluminal propagation at spectral hole-burning regions in magneto-optical atomic medium

Year: 2024

Type: article

Abstract: In the context of spectral hole-burning, normal dispersion with subluminal propagation is usually observed in the spectral hole-burning depth region. However, anomalous dispersion can occur in the continuous absorption peak region, which leads to superluminal light propagation. In this paper, we report an unusual behaviour of dispersion at discontinued absorption kink regions. We demonstrate both normal dispersion at the kink absorption region and anomalous dispersion at the spectral hole-burning depth region. The unusual dispersion leads to a positive group index in the absorption kink region and a negative group index in the spectral hole-burning depth region. The spectral hole-burning is due to variation of magnetization rather than the molecular distribution. The outcomes of our work offer promising applications in communication technologies and storage devices.

Source: Results in Physics

DOI: 10.1016/j.rinp.2024.107507

Authors: Aizaz Khan, Xiaoying Gu, Lei Gao, Lianping Hou, Jehan Akbar, Dongliang Gao

Institutions: Soochow University, Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou City University, University of Glasgow

Language: English

Topic: Quantum optics and atomic interactions

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,690

Funders: National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Collaborative Innovation Center of Suzhou Nano Science and Technology