Zhen Zhang , Linji Yang , Huan Zhou , Kuan Ye , Sen Qiu , Xin Chen , Yong Ma , Renpu Li
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引用次数: 0
Abstract
This letter presents a dual-frequency terahertz amplitude modulator based on a cross-shaped structure and U-shaped metal patches. Its structural unit is a typical metal-substrate structure. The top metal consists of a cross-shaped structure and U-shaped metal patches, and the bottom substrate layer is made of quartz. Amplitude modulation is achieved by adjusting the temperature of the vanadium dioxide (VO2) patches. The modulation depth can be approximately 75 %. The mechanism of the resonance frequency is explained by the equivalent circuit model. The proposed structure shows good amplitude modulation capability at different incidence and azimuth angles by changing the location of the VO2 patches. The dual-frequency terahertz amplitude modulator can be used in terahertz communication, imaging, etc.
本文介绍了一种基于十字形结构和 U 形金属贴片的双频太赫兹振幅调制器。其结构单元为典型的金属-基底结构。顶部金属由十字形结构和 U 形金属贴片组成，底部基底层由石英制成。振幅调制是通过调节二氧化钒（VO2）贴片的温度来实现的。调制深度约为 75%。等效电路模型解释了共振频率的机理。通过改变二氧化钒贴片的位置，拟议结构在不同入射角和方位角下显示出良好的振幅调制能力。这种双频太赫兹振幅调制器可用于太赫兹通信、成像等领域。
期刊介绍：
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
Optics:
-Optics design, geometrical and beam optics, wave optics-
Optical and micro-optical components, diffractive optics, devices and systems-
Photoelectric and optoelectronic devices-
Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials-
Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis-
Optical testing and measuring techniques-
Optical communication and computing-
Physiological optics-
As well as other related topics.
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