It is shown here how encapsulated graphene devices can be laterally coupled toplasmonic metasurfaces via 1D edge contacts, preserving the high mobility ofencapsulated graphene while enhancing optical coupling. The device is used forphotodetection applications where high responsivities in the range of 100 A W1for most of the visible spectrum are reported. The device exhibits a photogatingeffect which is attributed to defect states in the encapsulating hBN layers. Theresults highlight a new configuration to couple graphene with plasmonic structuresand points to a new type of device based on defect states and graphene’s excellenttransport properties to achieve photodetectors with ultrahigh responsivities.
Scientific Papers
hBN-Encapsulated Graphene Coupled to a Plasmonic Metasurface via 1D Electrodes for Photodetection Applications
Year
2024
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Summary
Christian Frydendahl, Sita Rama Krishna Chaitanya Indukuri, Taget Raghavendran Devidas, Zhengli Han, Noa Mazurski, Kenji Watanabe, Takashi Taniguchi, Hadar Steinberg, and Uriel Levy
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