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A tunable metamaterial based on plasmon-induced transparency effect
Optical and Quantum Electronics ( IF 3 ) Pub Date : 2021-01-01 , DOI: 10.1007/s11082-020-02693-y Fanzheng Zeng , Min Zhong
Optical and Quantum Electronics ( IF 3 ) Pub Date : 2021-01-01 , DOI: 10.1007/s11082-020-02693-y Fanzheng Zeng , Min Zhong
A Dirac semimetal-based metamaterial is proposed and numerically investigated. A transmission peak is achieved (71.5% amplitude, at resonance frequency 1.22 THz) based on plasmon-induced transparency effect (PIT) between Dirac semimetal strips. This PIT effect is excited by hybridization coupling of bright modes. This transmission peak is enhanced by adjusting horizontal or vertical distances between Dirac semimetal strips. Meanwhile, the resonance intensity and frequency of this PIT effect can be tuned through electrical regulation method (varying the Fermi energy). Moreover, magnetic field regulation method can also be applied in controlling the PIT effect (the direction of magnetic field is parallel or perpendicular). This PIT effect is sensitive to the refractive index of environmental medium. Correspondingly, the phase delay and group delay are also controlled through changing the Fermi energy of Dirac semimetal strips. This proposed PIT tunable metamaterial can be applied in switching, sensing, or other THz devices.
中文翻译:
基于等离子体诱导透明效应的可调超材料
提出并数值研究了基于狄拉克半金属的超材料。基于狄拉克半金属条带之间的等离子体诱导透明效应 (PIT),实现了传输峰值(振幅为 71.5%,共振频率为 1.22 THz)。这种 PIT 效应是由明亮模式的混合耦合激发的。通过调整 Dirac 半金属条之间的水平或垂直距离,可以增强这种传输峰值。同时,可以通过电调节方法(改变费米能量)来调节这种 PIT 效应的共振强度和频率。此外,磁场调节方法也可用于控制PIT效应(磁场方向平行或垂直)。这种 PIT 效应对环境介质的折射率很敏感。相应地,相位延迟和群延迟也是通过改变狄拉克半金属条的费米能量来控制的。这种提出的 PIT 可调谐超材料可应用于开关、传感或其他太赫兹设备。
更新日期:2021-01-01
中文翻译:
基于等离子体诱导透明效应的可调超材料
提出并数值研究了基于狄拉克半金属的超材料。基于狄拉克半金属条带之间的等离子体诱导透明效应 (PIT),实现了传输峰值(振幅为 71.5%,共振频率为 1.22 THz)。这种 PIT 效应是由明亮模式的混合耦合激发的。通过调整 Dirac 半金属条之间的水平或垂直距离,可以增强这种传输峰值。同时,可以通过电调节方法(改变费米能量)来调节这种 PIT 效应的共振强度和频率。此外,磁场调节方法也可用于控制PIT效应(磁场方向平行或垂直)。这种 PIT 效应对环境介质的折射率很敏感。相应地,相位延迟和群延迟也是通过改变狄拉克半金属条的费米能量来控制的。这种提出的 PIT 可调谐超材料可应用于开关、传感或其他太赫兹设备。