Coherent superposition of photon- and phonon-assisted tunneling in coupled quantum dots

被引：70
|
作者：
Qin, H
Holleitner, AW
Eberl, K
Blick, RH
机构：
[1] Univ Munich, Ctr Nanosci, D-80539 Munich, Germany
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.64.241302
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on electron transport through an artificial molecule formed by two tunnel coupled quantum dots, which are laterally confined in a two-dimensional electron system of an AlxGa1-xAs/GaAs heterostructure. Coherent molecular states in the coupled dots are probed by photon-assisted tunneling (PAT). Above 10 GHz, we observe clear PAT as a result of the resonance between the microwave photons and the molecular states. Below 8 GHz, a pronounced superposition of phonon- and photon-assisted tunneling is observed. Coherent superposition of molecular states persists under excitation of acoustic phonons.
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页数：4
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