Giant vacuum-field Rabi splitting of intersubband transitions in multiple quantum wells

被引：28
|
作者：
Dupont, E. [1 ]
Gupta, J. A. [1 ]
Liu, H. C. [1 ]
机构：
[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada
来源：
PHYSICAL REVIEW B | 2007年 / 75卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.75.205325
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A large, 42 meV, vacuum-field Rabi splitting was observed between the upper and lower intersubband polariton branches of a moderately n-doped GaAs-AlGaAs multiple quantum well sample. For this structure, the Rabi energy represents 17% of the bare intersubband resonance, a situation corresponding to the ultrastrong coupling regime between the photon and intersubband excitations. A different phenomenon is also demonstrated: the occurrence of a higher mode polariton. The large tunability of the intersubband absorption with carrier concentration may lead to new optoelectronic devices.
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页数：5
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