Terahertz Excitation of a Coherent Λ-Type Three-Level System of Exciton-Polariton Modes in a Quantum-Well Microcavity

被引：26

作者：

Tomaino, J. L. ^{[1
]}

Jameson, A. D. ^{[1
]}

Lee, Yun-Shik ^{[1
]}

Khitrova, G. ^{[2
]}

Gibbs, H. M. ^{[2
]}

Klettke, A. C. ^{[3
,4
]}

Kira, M. ^{[3
,4
]}

Koch, S. W. ^{[3
,4
]}

机构：

[1] Oregon State Univ, Dept Phys, Corvallis, OR 97331 USA

[2] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA

[3] Univ Marburg, Dept Phys, D-35032 Marburg, Germany

[4] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 26期

基金：

美国国家科学基金会;

关键词：

BOSE-EINSTEIN CONDENSATION; SEMICONDUCTOR MICROCAVITIES; DOT;

D O I：

10.1103/PhysRevLett.108.267402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Interactions of few-cycle terahertz pulses with the induced optical polarization in a quantum-well microcavity reveal that the lower and higher exciton-polariton modes together with the optically forbidden 2p-exciton state form a unique Lambda-type three-level system. Pronounced nonlinearities are observed via time-resolved strong-terahertz and weak-optical excitation spectroscopy and explained with a fully microscopic theory. The results show that the terahertz pulses strongly couple the exciton-polariton states to the 2p-exciton state while no resonant transition between the two polariton levels is observed.

引用

页数：5

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