CAJ | 학술논문

单层石墨烯具有可调的太赫兹电导，有望应用于制作新型太赫兹器件，然而这种调谐的变化范围有限，通过多层石墨烯的堆叠可以拓展石墨烯太赫兹器件的性能上限。本文通过太赫兹时域光谱研究了石英衬底上不同层数堆叠的石墨烯的太赫兹透过特性，并使用 Drude 模型以及菲涅尔定律对实验结果进行了理论模拟。实验数据与理论结果的匹配表明：随机堆叠的多层石墨烯在太赫兹波段可以看作没有电子耦合的多个单层石墨烯，其太赫兹电导具有更宽的调谐范围，同时化学掺杂可以进一步提高材料的载流子浓度，从而获得更高的太赫兹电导。
단층석묵희구유가조적태혁자전도，유망응용우제작신형태혁자기건，연이저충조해적변화범위유한，통과다층석묵희적퇴첩가이탁전석묵희태혁자기건적성능상한。본문통과태혁자시역광보연구료석영츤저상불동층수퇴첩적석묵희적태혁자투과특성，병사용 Drude 모형이급비열이정률대실험결과진행료이론모의。실험수거여이론결과적필배표명：수궤퇴첩적다층석묵희재태혁자파단가이간작몰유전자우합적다개단층석묵희，기태혁자전도구유경관적조해범위，동시화학참잡가이진일보제고재료적재류자농도，종이획득경고적태혁자전도。
Monolayer graphene has tunable terahertz conductivity,therefore it has an excellent application prospect in potential new terahertz (THz)devices.In order to further extend the modulation depth of graphene-based THz devices,the study of stacked multilayer graphene will be very useful.In this paper,THz time-domain spectroscopy has been employed to investigate the transmission characteristics of stacked multilayer graphene samples on quartz substrates.Theoretical analysis based on Drude model and Fresnel coefficients have been used to explain the experimental phenomena.The results show that randomly stacked multilayer graphene which can be treated as multiple electronically decoupled monolayer graphene in the THz region has more ex-tended variation range of THz conductivity.What is more,the carrier concentration in the material can be further improved by chemical doping,resulting in higher THz conductivity.