耦合谐振电路系统中的Fano共振现象  

Fano resonance in a coupled RLC resonant circuit

作　　者：廖慧敏[1] 田广[1] 李智[1] LIAO Hui-min;TIAN Guang;LI Zhi(School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院,北京100871

出　　处：《物理实验》2022年第12期10-16,共7页Physics Experimentation

摘　　要：常见的共振响应谱表现为近似对称分布的洛伦兹线型,而Fano共振则表现出明显的非对称的响应谱.尝试在普通物理实验层次展示Fano共振现象,建立基础实验与前沿研究的联系,通过构建RLC耦合谐振电路系统,在实验上展示了Fano共振现象,作为其中的一种特殊情况,还展示了类似电磁感应透明的现象,并通过理论公式的计算解释了实验结果.The response spectra of most resonances usually show Lorentzian profiles,which are approximately symmetric around the resonance peaks.In contrast,Fano resonances show an evident asymmetric response spectra.This work aimed to show Fano resonance at the level of general physics experiments while establishing the relationship between basic teaching experiments and cutting edge researches.The Fano resonance was experimentally demonstrated in a coupled RLC circuit.As a special case,a phenomenon similar to the electromagnetically induced transparency was also presented.The experimental results were well explained by the calculation results of theoretical formulas.

关 键 词：Fano共振 RLC谐振电路 电磁感应透明 耦合 

分 类 号：O441[理学—电磁学]