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arXiv 0710.3306cond-mat.mes-hall
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平面量子点晶格中的轻质量布拉格腔极化激元

Light-mass Bragg cavity polaritons in planar quantum dot lattices

E. M. Kessler, M. Grochol, C. Piermarocchi

摘要:

从理论上研究了平面光腔中量子点晶格的激子-极化激元模式。Umklapp条款,其中激子与许多腔模相互作用,不同的倒易晶格矢量,出现在哈密顿由于周期性的点阵。我们专注于布拉格极化激元模式获得的激子和腔模式调谐到共振在高对称点的布里渊区。根据微腔设计,这些有限面内动量的极化激元模式可以被引导并且可以具有长寿命。此外,它们的有效质量可以非常小,大约为$10^{-8} m_0$($m_0$是裸电子质量),并且它们构成固体中最轻的类激子准粒子。

英文摘要:

The exciton-polariton modes of a quantum dot lattice embedded in a planar optical cavity are theoretically investigated. Umklapp terms, in which an exciton interacts with many cavity modes differing by reciprocal lattice vectors, appear in the Hamiltonian due to the periodicity of the dot lattice. We focus on Bragg polariton modes obtained by tuning the exciton and the cavity modes into resonance at high symmetry points of the Brillouin Zone. Depending on the microcavity design these polaritons modes at finite in-plane momentum can be guided and can have long lifetimes. Moreover, their effective mass can be extremely small, of the order of $10^{-8} m_0$ ($m_0$ is the bare electron mass), and they constitute the lightest exciton-like quasi-particles in solids.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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