{"title":"Switching from normal to anomalous dispersion via coherent field","authors":"H. Tajalli, M. Sahrai","doi":"10.1088/1464-4266/7/6/002","DOIUrl":null,"url":null,"abstract":"This paper investigates the group velocity of a probe field in a four-level atomic system. It is shown that switching from positive to negative dispersion can be achieved just by the intensity of the coupling field. Superluminal light propagation in the system at stake is accompanied by reduced absorption to make sure that the probe field is not attenuated as it passes through the medium.","PeriodicalId":87441,"journal":{"name":"Journal of optics. B, Quantum and semiclassical optics : journal of the European Optical Society","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1088/1464-4266/7/6/002","citationCount":"47","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of optics. B, Quantum and semiclassical optics : journal of the European Optical Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1464-4266/7/6/002","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 47
Abstract
This paper investigates the group velocity of a probe field in a four-level atomic system. It is shown that switching from positive to negative dispersion can be achieved just by the intensity of the coupling field. Superluminal light propagation in the system at stake is accompanied by reduced absorption to make sure that the probe field is not attenuated as it passes through the medium.