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Ultra-sensitive Parity-Time Symmetry based Graphene FET (PTS-GFET) Sensors

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Document pages: 4 pages

Abstract: A novel ultra-sensitive Parity-Time symmetry based Graphene FET (PTS-GFET)sensor is studied for gas concentration detection. The PTS-GFET sensoreffectively integrates the sensitivity of the PT symmetry around itsExceptional Point (EP) and the tunability of the GFET conductance. The changeof GFET conductance with the gas concentration can be brought back to the EP ofthe PTS-GFET by tuning the gate voltage on the GFET. Thus, the applied gatevoltage indicates the gas concentration. The minimum detectable gasconcentration has been derived and estimated based on the experimental data,which shows that PTS-GFET can detect gas concentration below 50 ppb.

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