非对称双 InGaAs 量子阱中的相干激子耦合源于多体效应。
Coherent excitonic coupling in an asymmetric double InGaAs quantum well arises from many-body effects.
机构信息
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA.
JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0390, USA.
出版信息
Phys Rev Lett. 2014 Jan 31;112(4):046402. doi: 10.1103/PhysRevLett.112.046402. Epub 2014 Jan 28.
We study an asymmetric double InGaAs quantum well using optical two-dimensional coherent spectroscopy. The collection of zero-quantum, one-quantum, and two-quantum two-dimensional spectra provides a unique and comprehensive picture of the double well coherent optical response. Coherent and incoherent contributions to the coupling between the two quantum well excitons are clearly separated. An excellent agreement with density matrix calculations reveals that coherent interwell coupling originates from many-body interactions.
我们使用光学二维相干光谱研究了非对称双 InGaAs 量子阱。零量子、一量子和二量子二维光谱的收集提供了双阱相干光学响应的独特而全面的图像。两个量子阱激子之间的耦合的相干和非相干贡献被清楚地区分。与密度矩阵计算的极好一致性表明，相干的阱间耦合源于多体相互作用。
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