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Acta Optica Sinica

Eu^3＋：Y2SiO5晶体中电磁感应透明及群速度减慢研究

梁卿昌, 王海华, 蒋占魁

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

利用光与物质相互作用的密度矩阵方程及其数值解研究了Eu^3＋：Y2SiO5晶体中一种A型的电磁感应透明（EIT）和群速度减慢（SGV），得到了探测场的透射率随着探测场的失谐与耦合场的拉比频率的变化关系。分析了自旋子能级非均匀线宽及光学跃迁非均匀线宽对电磁感应透明和群速度减慢的影响，这两个线宽的增加不同程度地抑制了电磁感应透明。根据浓度与非均匀线宽的关系发现中心透射率不是随着浓度的增加而单凋变化，而是存在一个最佳浓度使电磁感应透明的效果更加明显。分析表明对某一耦合场强，光群速度存在一极小值。

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Pr^3＋：Y2SiO5晶体中电磁感应光透明及群速度减慢

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利用光与物质相互作用的密度矩阵方程及其数值解研究Λ型Pr^3＋：Y2SiO5晶体的电磁感应光透明（EIT）和光群速度减慢（SGV），分析非均匀加宽及相干驱动场强度对EIT和SGV的影响，理论与实验结果相符．

Journal of Jilin University(Science Edition)•Jan 1, 2007•0 citations

Eu^3＋：Y2SiO5晶体中射频场耦合四能级系统的电磁感应吸收和透明

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在Eu^3＋：Y2SiO5晶体中,以射频场耦合自旋子能级的方式,得到一个四能级系统。运用密度矩阵方程,研究了该射频场耦合四能级系统的吸收特性。结果表明,由于光学耦合场和射频场的共同作用,探测吸收谱可分别呈现出电磁感应透明（EIT）和电磁感应吸收（EIA）这两种相反的量子效应。当射频场共振作用时,在射频场导致的Autler-Townes分裂的双峰区域内出现EIT效应;非共振时,又会出现EIA效应。EIT和EIA窗口位置决定于光学耦合场的频率失谐量。改变射频场和光学耦合场的拉比频率、失谐量等参数,可以实现EIT和EIA窗口位置、线宽,以及这两种效应之间的转换控制。

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Transverse Optical Properties of the Eu 3+ :Y 2 SiO 5 Crystal in Electromagnetically Induced Transparency

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Chinese Physics Letters•Jun 1, 2015•1 citation

Demonstration of EIT functionalities and Autler-Townes effect with photoinduced waveguides

Charles Ciret, Virginie Coda, M. Alonzo +2 more

info:eu-repo/semantics/nonPublished

•Jan 1, 2013•0 citations
利用光与物质相互作用的密度矩阵方程及其数值解研究了Eu^3＋：Y2SiO5晶体中一种A型的电磁感应透明（EIT）和群速度减慢（SGV），得到了探测场的透射率随着探测场的失谐与耦合场的拉比频率的变化关系。分析了自旋子能级非均匀线宽及光学跃迁非均匀线宽对电磁感应透明和群速度减慢的影响，这两个线宽的增加不同程度地抑制了电磁感应透明。根据浓度与非均匀线宽的关系发现中心透射率不是随着浓度的增加而单凋变化，而是存在一个最佳浓度使电磁感应透明的效果更加明显。分析表明对某一耦合场强，光群速度存在一极小值。
在Eu^3＋：Y2SiO5晶体中,以射频场耦合自旋子能级的方式,得到一个四能级系统。运用密度矩阵方程,研究了该射频场耦合四能级系统的吸收特性。结果表明,由于光学耦合场和射频场的共同作用,探测吸收谱可分别呈现出电磁感应透明（EIT）和电磁感应吸收（EIA）这两种相反的量子效应。当射频场共振作用时,在射频场导致的Autler-Townes分裂的双峰区域内出现EIT效应;非共振时,又会出现EIA效应。EIT和EIA窗口位置决定于光学耦合场的频率失谐量。改变射频场和光学耦合场的拉比频率、失谐量等参数,可以实现EIT和EIA窗口位置、线宽,以及这两种效应之间的转换控制。
According to density matrix equations of the interaction between light and matter, the expression for the susceptibility of the Eu 3+ :Y 2 SiO 5 crystal is obtained. When the control field is a Gaussian beam, we investigate and analyze the influence of probe detuning, the Rabi frequency of the control field and the laser line width on the transverse optical properties. We also analyze the influence of the dope-ion concentration on electromagnetically induced transparency (EIT). The analysis result indicates that the transmission is not a monotonic function of the dope-ion concentration. Based on the influences of various parameters on the transverse optical properties, we choose the appropriate parameters to realize the desired EIT and gradient refractive index, which has applications in focusing and imaging.