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

2020/07/09 by Lu Ou, Ou, Lu, Shaolin Liao +1 · 1 citation
Chemical Engineering · Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Analytical Chemistry and Sensors #Applied Physics (physics.app-ph) #FOS: Electrical engineering #FOS: Physical sciences #Mechanical and Optical Resonators #Photonic and Optical Devices #Systems and Control (eess.SY) #electronic engineering #information engineering

paper · pdf · doi:10.48550/arxiv.2007.04567

openalex publication_date 2020/07/09 · openalex created_date 2022/07/26 · openalex updated_date 2026/07/28

Abstract

A novel ultra-sensitive Parity-Time symmetry based Graphene FET (PTS-GFET)\nsensor is studied for gas concentration detection. The PTS-GFET sensor\neffectively integrates the sensitivity of the PT symmetry around its\nExceptional Point (EP) and the tunability of the GFET conductance. The change\nof GFET conductance with the gas concentration can be brought back to the EP of\nthe PTS-GFET by tuning the gate voltage on the GFET. Thus, the applied gate\nvoltage indicates the gas concentration. The minimum detectable gas\nconcentration has been derived and estimated based on the experimental data,\nwhich shows that PTS-GFET can detect gas concentration below 50 ppb.\n

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