动态光子晶体中V型三能级原子的自发辐射

发布时间：2018-04-26 12:04

本文选题：光子晶体 + V型三能级原子　；参考：《物理学报》2017年01期

【摘要】：研究了动态各向同性光子晶体中V型三能级原子的自发辐射,主要讨论了光子晶体能带带边频率受到阶跃调制和三角函数周期调制两种情况下,调制参数对占据数演化的控制作用,以及此过程中量子相干效应带来的影响.结果表明,阶跃调制时,调制发生后原子上能级劈裂出来的束缚缀饰态数目只取决于原子的跃迁频率和此时的带边频率,且与具有相同参数条件的静态情形下的相同.调制发生时刻对其后原子上能级占据数的长时演化情况有影响.随系统初态的不同,量子相干效应既可导致调制之后占据数迅速衰减,也可使原子上能级保留较多的占据数.三角函数周期调制时,原子上能级总占据数在足够长的时间之后随时间做频率近似等于调制频率的有衰减的准周期振荡.衰减率与调制频率有关,也因量子相干效应而受系统初态以及偶极矩夹角的影响.
[Abstract]:The spontaneous emission of V-type three-level atoms in dynamically isotropic photonic crystals is studied. The control effect of modulation parameters on the evolution of the occupation number and the effect of quantum coherence in the process. The results show that when step modulation occurs, the number of bound ornaments split from the upper level of the atom only depends on the transition frequency and the band-edge frequency of the atom, and is the same as that in the static case with the same parameter conditions. The modulation time has an effect on the long term evolution of the upper energy level occupation. As the initial states of the system vary, the quantum coherence effect not only leads to the rapid decay of the occupation number after modulation, but also makes the upper level of the atom retain more occupied numbers. When the trigonometric function is periodically modulated, the total occupied number of the upper energy level of the atom after long enough time is approximately equal to the attenuation quasiperiodic oscillation of the modulation frequency with time. The attenuation rate is related to the modulation frequency and is also affected by the initial state of the system and the angle of the dipole moment due to the quantum coherence effect.
【作者单位】：同济大学物理科学与工程学院先进微结构材料教育部重点实验室;
【基金】：国家自然科学基金(批准号:11074188,11274242) 国家自然科学基金委员会-中国工程物理研究院联合基金(批准号:U1330203) 国家重点基础研究计划特别基金(批准号:2011CB922203,2013CB632701)资助的课题~~
【分类号】：O734

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