QUANTUM INTERFERENCE IN THE SYSTEM OF LORENTZIAN AND FANO MAGNETOEXCITON RESONANCES IN GAAS

被引：37

作者：

SIEGNER, U ^{[1
]}

MYCEK, MA ^{[1
]}

GLUTSCH, S ^{[1
]}

CHEMLA, DS ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.51.4953

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using femtosecond four-wave mixing (FWM), we study the coherent dynamics of Lorentzian and Fano magnetoexciton resonances in GaAs. For unperturbed Lorentzian magnetoexcitons, we find that the time-integrated FWM signal decays due to dephasing processes as expected for Lorentzian resonances. The time-integrated FWM signal from a single Fano magnetoexciton resonance, however, decays quasi-instantaneously although the dephasing time of the Fano resonance is much longer than the time resolution of the experiment. This fast decay is the manifestation of destructive quantum interference. Although destructive quantum interference in our system is closely related to the dynamics of Fano resonances, for the simultaneous excitation of Lorentzian and Fano magnetoexciton resonances destructive quantum interference also strongly affects the dynamics of Lorentzian magnetoexcitons due to quantum-mechanical coupling between the two types of resonances. © 1995 The American Physical Society.

引用

页码：4953 / 4961

页数：9

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