一维冷原子晶格中相干诱导三光子带隙  

Tunable three photonic band-gaps coherently induced in one-dimensional cold atomic lattices

作　　者：巴诺[1] 王磊[2] 张岩[3] 

机构地区：[1]吉林师范大学物理学院,四平136000 [2]吉林大学物理学院,长春130012 [3]东北师范大学物理学院,长春130024

出　　处：《物理学报》2014年第3期178-185,共8页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11247201;11247005;11347137)资助的课题~~

摘　　要：基于电磁感应透明技术,将相干耦合的Tripod型原子俘获在一维光晶格中并使其呈高斯型分布,由于介质的折射率被一维光晶格周期性调制,从而实现动态调控的三光子带隙结构.通过求解光场与原子相互作用密度矩阵方程以及光波在周期性介质中散射的传输矩阵方程,计算出探测场在相干驱动介质中的稳态反射谱和透射谱.计算结果表明:光子带隙的位置、宽度以及反射率可以通过改变两个耦合场的失谐、强度和几何布拉格失谐来调谐.Using the technique of electromagnetically induced transparency, three photonic bandgaps can be established and manipulated at any time due to the refraction modulated periodically by the one-dimensional optical lattice in a tripod atomic system which is trapped in a one-dimensional optical lattice with a Gaussian density distribution. Using the density-matrix equations to describe the interaction between laser and atoms and the transfer-matrix equation to describe the scattering of light waves in periodic media, we can obtain the steady reflection and transmission spectra. It can be found that the position and width as well as the reflectivity of the photonic band-gap could be tuned by changing the detunings and intensities of the coupling fields and the geometric Bragg detuning.

关 键 词：原子相干 电磁感应透明 光子带隙 

分 类 号：O413[理学—理论物理]