High-order harmonic spectroscopy for probing intraband and interband dynamics

被引:0
|
作者
Wang, Gan [1 ]
Chen, Yu-Xuan [1 ,2 ]
Li, Mingjie [3 ,4 ]
Du, Tao-Yuan [1 ,2 ]
机构
[1] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China
[2] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China
[3] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Peoples R China
[4] Hong Kong Polytech Univ, Shenzhen Res Inst, Shenzhen 518057, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
GENERATION; ELECTRONS; RADIATION; FIELDS; PHASE; BANDS;
D O I
10.1103/PhysRevA.109.063511
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Regarding the high -order harmonic generation (HHG) of solids, the intraand interband contributions have been disputed for over a decade now. The prior scheme in this context has been limited to resolve the temporal HHG profile. In this work we propose that the real-space intraand intercell dynamics in crystal structure respectively correspond to the reciprocal-space inter- and intraband dynamics. Thus, we utilize the polarizationresolved symmetry of the HHG yield to clarify its dominant term among the inter- and intraband contributions. For simplicity, we necessarily exclude the impact of the propagation effect and therefore take the monolayer MoS 2 as the representative target material. Robustness of this correspondence scheme has been demonstrated by distinguishing the dominant contribution in the parallel HHG spectra. According to the change of the symmetry in the polarization-resolved harmonic yields, in the case of the tuning carrier distribution the transition of the dominant term between intraand interband contributions has been verified. This work paves an alternative way to resolve the intraand interband dynamics based on the structural symmetries of the atomic layer materials.
引用
收藏
页数:7
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