Transverse Anderson Localization of Exciton-Polaritons in Microcavities With Single-Layer WS2

Transverse Anderson Localization of Exciton-Polaritons in Microcavities With Single-Layer WS2
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单层 WS2 微腔中激子极化子的横向安德森局域化

DOI:
10.1109/jstqe.2019.2921394
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发表时间:
2019-11
影响因子:
4.9
通讯作者:
C.Y. Zheng
C.Y. Zheng
中科院分区:
工程技术2区
文献类型:
--
作者:
S.S. Wang;X.J. Li;W.L. Zhang;C.Y. Zheng

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激子-极化子作为纠缠的光子和激子准粒子,同时具有电磁波和物质波的特性,其中的输运性质是未来光电/量子网络应用的关键。在这里,我们分别从理论上证明了激子-极化子在无无序和有无序存在的单层WS2微腔中的弹道输运和Anderson局域化。揭示了光子与激子之间的强耦合以及光子/激子无序对极化子局域输运的影响。结果表明,强耦合会降低扩散速度,局域化程度取决于无序的类型和势能高度。
As entangled photon and exciton quasiparticles, exciton-polaritons exhibit characteristics of both electromagnetic wave and matter wave, in which transport properties are key for future applicat ions of photoelectronic/quantum networking. Here, we theoretically demonstrate ballistic transport and Anderson localization of exciton-polaritons in microcavities with monolayer WS2 in the absence and presence of disorder, respectively. The impact of strong coupling between photons and excitons as well as the influence of photonic/excitonic disorder on the localization transport of polaritons are revealed. The results show that strong coupling will decrease the diffusion speed, and the degree of localization is determined by the types and potential height of disorder.
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