摘要
建立了石墨烯光栅模型,基于快速收敛傅里叶模型方法计算了太赫兹频段的石墨烯光栅透射率,讨论了费米能级、光栅周期、光栅占空比和弛豫时间对透射率的影响。研究结果表明,在正入射条件下,透射率随频率的增大先减小后增加,且费米能级、占空比和弛豫时间越高,透射率的最小值越小。在入射光频率为2 THz的条件下,透射率随入射角的增大先增加后减小,且透射率在入射角约为60°时取得最大值。以上研究为石墨烯光栅的理论研究及其实际应用提供了有力指导。
Based on the fast convergent Fourier model,the transmittance of the graphene gratings was calculated in terahertz waveband,the influences of Fermi energy,grating period,grating duty cycle and relaxation time of the graphene gratings on the transmittance were discussed under two conditions of normal incidence and fixed frequency. The results show that when the incident TM polarized plane wave is normal to the graphene gratings,the transmittance decreases to a minimum and then increases with the increase of frequency,and the minimum value of transmittance is smaller when the values of Fermi energy,grating duty cycle and relaxation time are bigger. The transmittance increases to a maximum and then decreases with the increase of incident angle when the incident frequency is fixed. Meanwhile,the transmittance gains the maximum value while the incident angle is about 60 degrees. The results of this study will provide significant guidance for the study of graphene gratings.
出处
《激光与红外》
CAS
CSCD
北大核心
2015年第11期1369-1374,共6页
Laser & Infrared
基金
国家自然科学基金(No.61001018)
山东省自然科学基金(No.ZR2012FM011)
山东省高等学校科技计划项目(No.J11LG20)
青岛市创新领军人才项目(No.13-CX-25)
中国工程物理研究院太赫兹科学技术基金资助(No.201401)
青岛经济技术开发区重点科技计划项目(No.2013-1-64)
山东科技大学科技创新基金(No.YC140108)资助
关键词
石墨烯光栅
傅里叶模方法
太赫兹
透射特性
graphene gratings
Fourier model method
terahertz
transmission characteristics
作者简介
李彤彤（1990-），女，在读硕士，从事太赫兹技术与器件的研究工作。E—mail：litongtong90@126．com
