Yi Huang, Shuncong Zhong,
http://ieeexplore.ieee.org/document/8068489/
Graphene plasmons exhibit much larger confinement and relatively long propagation distances at terahertz (THz) regime, with the advantage of being highly tunable via electrical and chemical doping. Thus, it provide a suitable alternative to noble-metal plasmons. We investigated the Otto configuration based THz-plasmonics sensor using a continuous suspended monolayer graphene (MLG) and graphene/insulator stacks (GIS) by finite element method (FEM). We revealed that a continuous suspended MLG based sensor has extremely high detection accuracy and promising prospect of application in ultrasensitive THz-plasmonics gas sensing. In addition, more layers of graphene will result in higher detection accuracy, but lower sensitivity and FOM of the sensor using GIS.
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