Observation of excitonic resonances in the second harmonic spectrum of MoS2

被引：55

作者：

Trolle, Mads L. ^{[1
]}

Tsao, Yao-Chung ^{[1
]}

Pedersen, Kjeld ^{[1
]}

Pedersen, Thomas G. ^{[1
]}

机构：

[1] Aalborg Univ, Dept Phys & Nanotechnol, DK-9220 Aalborg, Denmark

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 16期

关键词：

GENERATION;

D O I：

10.1103/PhysRevB.92.161409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measure the second harmonic (SH) response of MoS2 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 an exciton simulation of the SH properties of multilayered MoS2 samples, represented by a study of trilayer MoS2. 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 nonlinear excitation of electron-hole pairs.

引用

页数：5

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