Abstract

Recently, the terahertz metamaterials based on perovskite have become a hot spot due to the special optical properties. Therefore, a planar metamaterial consisting of split-ring resonators (SRRs) and perovskite is proposed to realize a transition from toroidal dipolar to electric dipole at terahertz frequency. We theoretically research on the strong association between perovskite and the planar metamaterial. Simulations show the transmission amplitude of toroidal dipolar resonance can be dynamically tuned and eventually almost disappears with increasing the photoconductivity of perovskite. The metamaterial we proposed have the capability to design some applications such as tunable terahertz lasers, terahertz polarizers and so on.

摘要

近年来，基于钙钛矿的太赫兹超材料由于其特殊的光学特性而成为研究热点。因此，提出了一种由裂环谐振器（SRR）和钙钛矿组成的平面超材料，以实现在太赫兹频率下从环形偶极子到电偶极子的转变。我们从理论上研究了钙钛矿和平面超材料之间的强关联。模拟表明，环形偶极共振的传输幅度可以动态调整，最终随着钙钛矿光电导率的增加几乎消失。我们提出的超材料具有设计一些应用的能力，例如可调谐太赫兹激光器、太赫兹偏振器等。