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Tunable structures and modulators for THz light

机译:太赫兹光的可调结构和调制器

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摘要

We review recent results of both experimental and theoretical work aimed at developing tunable devices with optical properties in the THz range controllable by an external parameter. The presented devices include a semiconductor platelet, strontium titanate based elements and one-dimensional photonic crystals with defects. We show that it is possible to strongly modulate the complex permittivity in the THz range by light illumination, temperature and voltage, and the experimental results obtained by time-domain terahertz spectroscopy are found to be in a very good agreement with theoretical calculations. The control by illumination or applied bias enable a very fast modulation of the THz waves which is useful for prospect applications e.g. in the domain of communications.
机译:我们回顾了旨在开发具有可通过外部参数控制的THz范围内的光学特性的可调器件的实验和理论工作的最新结果。提出的器件包括半导体薄片,钛酸锶基元素和具有缺陷的一维光子晶体。我们表明,可以通过光照,温度和电压强烈地调制太赫兹范围内的复介电常数,并且发现时域太赫兹光谱法获得的实验结果与理论计算非常吻合。通过照明或施加的偏压进行控制,可以对太赫兹波进行非常快速的调制,这对前景应用非常有用,例如:在通讯领域。

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