极化子
激子
激子极化
斯塔克效应
极化(电化学)
单层
Valleytronics公司
半导体
凝聚态物理
光电子学
材料科学
物理
化学
电场
纳米技术
物理化学
量子力学
铁磁性
自旋电子学
作者
Trevor LaMountain,Erik J. Lenferink,Samuel H. Amsterdam,Mark C. Hersam,Nathaniel P. Stern
摘要
Microcavity exciton-polaritons based on transition metal dichalcogenide monolayers (TMDs) are a promising platform for coherent valleytronics, exhibiting valley-dependent phenomena at room-temperature. Using polarization-dependent transient reflectance, we demonstrate the valley-exclusive nature of the optical Stark effect in WS2 exciton-polaritons. We observe a simultaneous shift of both polariton branches when pump and probe are co-polarized and no appreciable shift when they are cross-polarized, demonstrating a polarization-selective stark shift in exciton-polaritons. This work highlights how the unique features of TMD exciton-polaritons can give rise to new polaritonic phenomena.
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