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arXiv 1506.08653cond-mat.mes-hall
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MoS $_2$二次谐波谱中激子共振的观测

Observation of excitonic resonances in the second harmonic spectrum of MoS$_2$

Mads L. Trolle, Yao-Chung Tsao, Kjeld Pedersen, Thomas G. Pedersen

摘要:

我们测量的二次谐波(SH)响应的MoS $_2$在一个广泛的基本光子能量范围在0.85和1.7 eV之间,并提出了一个连续的SH光谱捕获签名的基本A和B激子除了强烈的C共振。此外,我们解释了我们的结果在第一激子模拟的SH性能的多层MoS $_2$样品,由三层MoS $_2$的研究为代表。理论和实验之间的良好一致性使我们能够在阐明电子空穴对的非线性激发的过程中,在测量的光谱和底层电子结构之间建立联系。

英文摘要:

We measure the second-harmonic (SH) response of MoS$_2$ in a broad fundamental photon energy range between 0.85 and 1.7 eV, and present a continuous SH spectrum capturing signatures of both the fundamental A and B excitons in addition to the intense C resonance. Moreover, we interpret our results in terms of the first exciton simulation of the SH properties of multi-layered MoS$_2$ samples, represented by a study of trilayer MoS$_2$. The good agreement between theory and experiments allows us to establish a connection between the measured spectrum and the underlying electronic structure, in the process elucidating the non-linear excitation of electron-hole pairs.

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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