时间周期双阱势中光子辅助Dirac电子的Fano共振隧穿  

Fano Resonance in Photon-Assisted Dirac Electron Transmission through a Time-Periodic Double-Well Potential

作　　者：彭坦 周斌[1] 

机构地区：[1]湖北大学物理与电子科学学院,湖北武汉

出　　处：《凝聚态物理学进展》2017年第4期86-95,共10页Advances in Condensed Matter Physics

基　　金：中国国家自然科学基金(11274102);教育部新世纪优秀人才支持计划(NCET-11-0960);教育部博士点基金(博导类)(20134208110001)。

摘　　要：在具有时间周期双阱势的石墨烯体系中,我们研究了光子辅助Dirac电子的Fano型共振隧穿。研究结果表明,由于双阱势中束缚态能级的劈裂,Fano型共振谱会分裂成两个不对称的共振峰。这两个非对称Fano型共振峰的形状不同。并且,两个振荡场的相对相位可以调制非对称Fano型共振峰的形状。此外,我们还可以通过改变振荡场的频率、振幅以及静势阱的结构来调制Fano峰的轮廓。The photon-assisted Fano-type resonance transmission of a Dirac electron through a time-periodic double-well potential in graphene is investigated. It is shown that the Fano-type resonance spectra through double wells are divided into two asymmetric resonance peaks due to the level splitting of bound state in double wells. The line shapes of two asymmetric Fano-type resonance peaks are different. Moreover, the relative phase of the two oscillating fields can adjust the line shapes of the asymmetry Fano-type resonance peaks. Additionally, the profile of Fano-type resonance can be also controlled by adjusting the frequency and amplitude of the applied oscillating fields, and the structure of the static quantum wells.

关 键 词：Fano共振 光子辅助隧穿 Dirac电子 Floquet散射矩阵 

分 类 号：O41[理学—理论物理]