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首页> 外文期刊>Selected Topics in Quantum Electronics, IEEE Journal of >Wavenumber-Domain Theory of Terahertz Single-Walled Carbon Nanotube Antenna
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Wavenumber-Domain Theory of Terahertz Single-Walled Carbon Nanotube Antenna

机译：太赫兹单壁碳纳米管天线的波数域理论

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摘要

A theoretical study is presented on the characteristics of terahertz antennas formed by metallic single-walled carbon nanotube (SWCNT) dipoles. The Boltzmann transport equation and Maxwell’s equations are combined with boundary conditions of the electron distribution function, in order to formulate a wavenumber-domain integral equation for the current, which considers the spatial dispersion and provides higher level of accuracy and generality than existing approaches. Through proper approximations of that equation, the same spatial integral equations from several other studies can be drawn. The radiation properties of the SWCNT antenna are derived from the wavenumber-domain current. Numerical results are given for short dipole antennas and those with length close to the half wavelength in free space. They are compared to the results calculated by other methods. We also investigate the frequency dependence of conductance under different values of relaxation frequency and find the increase of relaxation frequency leads to strong attenuation of surface-wave resonances.
机译：对金属单壁碳纳米管（SWCNT）偶极子形成的太赫兹天线的特性进行了理论研究。玻耳兹曼输运方程和麦克斯韦方程与电子分布函数的边界条件相结合，以便为电流公式化一个波数域积分方程，该方程考虑了空间色散并提供了比现有方法更高的准确性和通用性。通过对该方程的适当近似，可以得出来自其他一些研究的相同空间积分方程。 SWCNT天线的辐射特性是从波数域电流得出的。给出了短偶极天线和长度接近自由空间中一半波长的天线的数值结果。将它们与其他方法计算的结果进行比较。我们还研究了不同弛豫频率值下电导的频率依赖性，发现弛豫频率的增加会导致表面波谐振的强烈衰减。

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