Ultrafast dephasing of coherent intersubband polarizations in a quasi-two-dimensional electron plasma

被引：54

作者：

Kaindl, RA ^{[1
]}

Lutgen, S

Woerner, M

Elsaesser, T

Nottelmann, B

Axt, VM

Kuhn, T

Hase, A

Kunzel, H

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Univ Munster, Inst Theoret Phys 2, D-10587 Munster, Germany

[3] Heinrich Hertz Inst Nachrichtentech Berlin GmbH, D-10587 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.80.3575

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first study of coherent intersubband polarizations in a pure electron plasma by femtosecond four-wave mixing in the midinfrared. Resonantly excited polarizations between consecutive conduction subbands of narrow GaInAs/AlInAs quantum wells decay within about 500 fs, much faster than intersubband relaxation of electrons. The relation between the decay rate of the signals and the dephasing rate is analyzed by solving the time-dependent Hartree-Fock equations for the single-particle density matrix. Electron-electron scattering is identified as the main dephasing mechanism.

引用

页码：3575 / 3578

页数：4

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