Ultrafast and spatially resolved studies of charge carriers in atomically thin molybdenum disulfide

被引：223

作者：

Wang, Rui ^{[1
]}

Ruzicka, Brian A. ^{[1
]}

Kumar, Nardeep ^{[1
]}

Bellus, Matthew Z. ^{[1
]}

Chiu, Hsin-Ying ^{[1
]}

Zhao, Hui ^{[1
]}

机构：

[1] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

来源：

PHYSICAL REVIEW B | 2012年 / 86卷 / 04期

基金：

美国国家科学基金会;

关键词：

QUANTUM-WELLS; MOS2; LAYERS; PHOTOLUMINESCENCE; EXFOLIATION; CRYSTALS;

D O I：

10.1103/PhysRevB.86.045406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Atomically thin molybdenum disulfide is emerging as a new nanomaterial with potential applications in the fields of electronic and photonics. Charge carrier dynamics plays an essential role in determining its electronic and optical properties. We report spatially and temporally resolved pump-probe studies of charge carriers in atomically thin molybdenum disulfide samples fabricated by mechanical exfoliation. Carriers are injected by interband absorption of a 390-nm pump pulse and detected by measuring differential reflection of a time-delayed and spatially scanned probe pulse that is tuned to an exciton transition. Several parameters on charge carrier dynamics are deduced, including carrier lifetime, diffusion coefficient, diffusion length, and mobility.

引用

页数：5

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