太赫兹超材料的吸收调制方法

发布时间：2018-05-10 19:02

本文选题：材料 + 太赫兹光学　；参考：《激光与光电子学进展》2016年11期

【摘要】：超材料吸收器由金属谐振腔、电介质层和金属底层平面这3部分组成。利用阻抗匹配原理或多次反射干涉理论可以定性或定量地解释超材料结构对入射的电磁波在某一共振吸收峰出现完美吸收的原因。然而,当超材料的结构参数一旦确定,就只能在特定的共振频率产生完美吸收。因此,如何调制超材料吸收器的吸收频率以及吸收强度引起了人们的广泛关注。近些年来,本课题组研究了如何实现超材料吸收器的动态调制。在此基础之上,综述几种可以有效地调制太赫兹超材料吸收的方法,包括改变中间电介质层的厚度、调节金属底层平面的电导率或在金属谐振腔的开口处添加光敏半导体材料,并对太赫兹超材料的吸收调制的发展前景进行了展望。
[Abstract]:Metamaterial absorber consists of metal resonator, dielectric layer and metal underlayer plane. The impedance matching principle or the theory of multiple reflection interference can be used to explain qualitatively or quantitatively the reason for the perfect absorption of the incident electromagnetic wave by the metamaterial structure at a certain resonant absorption peak. However, once the structural parameters of the metamaterials are determined, they can only produce perfect absorption at a specific resonance frequency. Therefore, how to modulate the absorption frequency and absorption intensity of metamaterial absorbers has attracted much attention. In recent years, our team has studied how to realize the dynamic modulation of metamaterial absorbers. On this basis, several methods that can effectively modulate the absorption of terahertz supermaterials are reviewed, including changing the thickness of the intermediate dielectric layer, adjusting the conductivity of the metal underlayer plane or adding Guang Min semiconductor materials to the opening of the metal resonator. The prospect of absorption modulation of terahertz supermaterial is also prospected.
【作者单位】：首都师范大学物理系北京市太赫兹波谱与成像重点实验室太赫兹光电子学教育部重点实验室北京成像技术高精尖创新中心;
【基金】：国家重大科学仪器设备开发专项(2012YQ140005) 国家自然科学基金(61505125) 北京自然科学基金(4144069) 北京市教育委员会科技计划项目(KM201410028004)
【分类号】：TB39

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