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.
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页数：5
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