可见光紫端748 THz处的高透过率负折射率材料模拟研究  

Simulation study on a negative refractive index material with high transmission at 748 THz——The violet end of the visible region

作　　者：卓士创[1] 闫长春[1] 

机构地区：[1]徐州师范大学物理与电子工程学院,徐州221116

出　　处：《物理学报》2010年第1期360-364,共5页Acta Physica Sinica

基　　金：江苏省自然科学基金(批准号:BK2007204);江苏省高等学校自然科学基金(批准号:07KJD140208)资助的课题~~

摘　　要：提出一种以四边缺口的三层纳米方片为基本离散单元的左手材料,对单元的S参数进行仿真计算,并对反演得到的复折射率n、复介电常数ε、复磁导率μ等特性参数进行分析.结果表明,这种结构的负折射率频域分布在可见光的蓝光至近紫外区域,负折射率峰值位于可见光紫端边缘748THz处,且此时材料的品质因数(FOM)为15.4,材料损耗极小,透过率极高,有利于实际应用.A left-handed material composed of unit cells of three-layered square nanoflake with four edges gapped is proposed in this paper. The S-parameters of the unit cell are eaeulated in the numeric simulation, and the property parameters such as the retrieved complex refractive index n, permittivity ε and permeability μ, etc. are analyzed. It is shown that, the frequency band in which the refractive index of this structure being negative lies from blue in the visible region to near uhraviolet, and the peak of negative refractive index lies at 748 THz, namely the violet end of the visible region. And the figure of merit of the material is 15.4, so it may have practical applications because of its low loss and high transmission.

关 键 词：负折射率材料 可见光谱区 高透过率 数值模拟 

分 类 号：O441.6[理学—电磁学]