CAJ | 학술논문

利用随机相位近似（PRA）下石墨烯薄层的电导率模型，研究了石墨烯表面电导率、表面阻抗和等效介电常数随温度与化学势的变化关系；在远红外和中红外波段，研究了无限大石墨烯产生表面等离激元的条件及有效模式指数；最后，根据电磁波的散射特性，研究了石墨烯的透射系数与化学势的变化关系。结果表明：石墨烯表面电导率和表面阻抗受温度影响较小，而受化学势影响较大；在远红外和中红外波段，石墨烯的表面感抗远大于表面电阻，这为表面等离激元的产生创造了充足的条件；在远红外波段，石墨烯的透射系数受化学势影响较大，而在可见光波段，透射系数基本不受化学势的影响。
이용수궤상위근사（PRA）하석묵희박층적전도솔모형，연구료석묵희표면전도솔、표면조항화등효개전상수수온도여화학세적변화관계；재원홍외화중홍외파단，연구료무한대석묵희산생표면등리격원적조건급유효모식지수；최후，근거전자파적산사특성，연구료석묵희적투사계수여화학세적변화관계。결과표명：석묵희표면전도솔화표면조항수온도영향교소，이수화학세영향교대；재원홍외화중홍외파단，석묵희적표면감항원대우표면전조，저위표면등리격원적산생창조료충족적조건；재원홍외파단，석묵희적투사계수수화학세영향교대，이재가견광파단，투사계수기본불수화학세적영향。
The dependence of the graphene’s surface conductivity,the equivalent surface impedance and permittivity on the tem-perature and chemical potential was studied based on the graphene sheet’s conductivity model of random-phase approximation (RPA).In far-infrared and mid-infrared band,the conditions for the existence of surface plasmon polaritons,and the effective surface plasmon polaritons mode index of the infinite planar grapheme were investigated.Finally,the dependence of transmission coefficient on chemical potential based on the property of electromagnetic waves was researched.The result proves that the sur-face conductivity and surface impedance hardly depend on the temperature,and largely depend on the chemical potential.Surface inductive reactance is greater than the surface resistance,which provides the adequate conditions for the existence of surface plas-mon polaritons.The transmission coefficient largely depends on the chemical potential in far-infrared band.However,the trans-mission coefficient is not affected by chemical potential in visible light.