Exciton dynamics studied via internal THz transitions

被引：6
作者：
Kaindl, RA
Hägele, D
Carnahan, MA
Lövenich, R
Chemla, DS
机构：
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] EO Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
[3] Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 2003年 / 238卷 / 03期
关键词：
D O I：
10.1002/pssb.200303161
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We employ a novel, ultrafast terahertz probe to investigate the dynamical interplay of optically-induced excitons and unbound electron-hole pairs in GaAs quantum wells. Resonant creation of heavy-hole excitons induces a new low-energy oscillator linked to transitions between the internal exciton degrees of freedom. The time-resolved terahertz optical conductivity is found to be a probe well suited for studies of fundamental processes such as formation, relaxation and ionization of excitons. (C) 2003 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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页码：451 / 454
页数：4
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