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Optimizing Broadband Terahertz Modulation with Hybrid Graphene/Metasurface Structures
S. -F. Shi, B. Zeng, H. -L. Han +6
We demonstrate efficient terahertz (THz) modulation by coupling graphene strongly with a broadband THz metasurface device. This THz metasurface, made of periodic gold slit arrays,…
Ultrafast Charge Transfer in Atomically Thin MoS2/WS2 Heterostructures
Xiaoping Hong, Jonghwan Kim, Su-Fei Shi +7
Van der Waals heterostructures have recently emerged as a new class of materials, where quantum coupling between stacked atomically thin two-dimensional (2D) layers, including grap…
Ultrafast Generation of Pseudo-magnetic Field for Valley Excitons in WSe2 Monolayers
Jonghwan Kim, Xiaoping Hong, Chenhao Jin +5
A new degree of freedom, the valley pseudospin, emerges in atomically thin two-dimensional transition metal dichalcogenides (MX2) and has attracted great scientific interest. The c…
Evolution of Interlayer Coupling in Twisted MoS2 Bilayers
Kaihui Liu, Liming Zhang, Ting Cao +7
Van der Waals (vdW) coupling is emerging as a powerful method to engineer and tailor physical properties of atomically thin two-dimensional (2D) materials. In graphene/graphene and…