摘要
基于量子力学Λ-型能级系统,建立微波场驱动下的双电场作用三能级系统模型.由系统密度矩阵推导探测场的微分方程,采用四阶龙库塔数值计算方法对其进行理论模拟,从而研究该能级系统的稳态吸收特性,并对其作用场及原子能级体系进行分析.结果表明,当失谐量为零时探测场呈现轻微振荡,几乎无吸收传播;当失谐量不为零时,探测场的强度会随失谐量的增加而急剧减弱,并出现电磁诱导透明现象.为此,采用相干性理论探究其物理机制.
Based on the Λ-type level system in quantum mechanics,a three-level Λ-type system model with double electric field driven by microwave is established.The differential equation of the detection field is derived by the system density matrix,and is simulated by four order Runge Kutta numerical method.The steady state absorption properties of the system are stud-ied,the interaction field and the atomic energy level system are analyzed.The results show that when the detuning is zero,the detection field could present a slight oscillation,almost no ab-sorption propagation;when the detuning is not zero,the intensity of the detection field decrea-ses sharply with the inerease of detuning,and electromagnetically induced parency occurs.Therefore,the coherence theory is used to explore its physical mechanism.The strength of de-tection field will greatly decay as the detuning amount is nonzero.The calculation results im-plements the electromagnetic induction of transparent with the microwave fields and provide a clear information for related research.
作者
宋阳
王春兰
李泽斌
王亚薇
吕正
SONG Yang;WANG Chunlan;LI Zebin;WANG Yawei;LYU Zheng(School of Science, Xi＇an Polytechnic University, Xiran 710048, China;School of the Electronic and Information Engineering, xiran Jiaotong University, Xi＇an 710049,China)
出处
《西安工程大学学报》
CAS
2017年第5期721-726,共6页
Journal of Xi’an Polytechnic University
基金
国家自然科学基金资助项目(11604252)
陕西省教育厅基金资助项目(16JK1335
16JK1319)
西安工程大学博士科研启动资金资助项目(BS15026)
关键词
龙格库塔
微波场
电磁诱导透明
耦合
runge-kutta
microwave field
coupling
oscillation
transition
