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

Abstract

According to density matrix equations of the interaction between light and matter, the expression for the susceptibility of the Eu 3+ :Y2SiO5 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.

Perfect photon absorption based on the optical parametric process*

“…[1][2][3][4] In general, the communicating information needs some form of interaction between the signals. In the case of lights, this can be implemented by controlling light by light, [5,6] which yields many novel coherent phenomena, such as electromagnetically induced transparency (EIT), [6][7][8] electromagnetically induced absorption, [9,10] optomechanically induced transparency (OMIT), [11][12][13][14][15] optomechanically induced absorption (OMIA), [16,17] and so on. Recently, an analog of above phenomenon (coherent perfect photon absorption) has aroused widespread interest and attracts a great deal of attention in recent studies.…”