超灵敏的基于奇偶时间对称性的石墨烯FET（PTS-GFET）传感器
Ultra-sensitive Parity-Time Symmetry based Graphene FET (PTS-GFET) Sensors
摘要：
研究了一种新型超灵敏的基于奇偶时间对称性的石墨烯场效应晶体管（PTS-GFET）气体浓度传感器。PTS-GFET传感器有效地集成了PT对称性在其例外点（EP）周围的灵敏度和GFET电导的可调谐性。通过调节GFET上的栅极电压，可以将GFET电导随气体浓度的变化带回到PTS-GFET的EP。因此，所施加的栅极电压指示气体浓度。根据实验数据推导并估算了PTS-GFET的最小可探测气体浓度，结果表明PTS-GFET可以探测50 ppb以下的气体浓度。
英文摘要：
A novel ultra-sensitive Parity-Time symmetry based Graphene FET (PTS-GFET) sensor is studied for gas concentration detection. The PTS-GFET sensor effectively integrates the sensitivity of the PT symmetry around its Exceptional Point (EP) and the tunability of the GFET conductance. The change of GFET conductance with the gas concentration can be brought back to the EP of the PTS-GFET by tuning the gate voltage on the GFET. Thus, the applied gate voltage indicates the gas concentration. The minimum detectable gas concentration 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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