THz waveguide type VO2 temperature control switch

Abstract

The invention provides a THz waveguide type VO2 temperature control switch including a cylindrical hollow waveguide I having a periodical fluctuating structure, and a waveguide II composed of a VO2 thin film and a base, wherein the cylindrical hollow waveguide I having the periodical fluctuating structure, the VO2 thin film, and the base are successively arranged from the outside to the inside, and the periodical fluctuating structure is square. The THz waveguide type temperature control switch is less in loss, simple in structure, simple in performance tuning, and wide in control range, the control of whether the terahertz wave passes through the waveguide can be achieved through the attribute conversion from the insulation phase to the metal phase before and after the VO2 phase change temperature, so that the switching function can be achieved.

Description

Technical field [0001] The invention relates to a switch, in particular to a THz waveguide type VO 2 thermal control. Background technique [0002] Terahertz waves usually refer to electromagnetic waves with a frequency of 0.1 to 10 THz (wavelength range of 3000 to 30 μm), which have important application prospects in high-capacity and high-speed communications, but THz devices, especially controllable devices such as THz phase control , The lack of filtering, modulation, and switching devices restricts the development of THz communication technology. Among them, THz optical switches are one of the key components of terahertz communication, and their research is of great significance. [0003] In recent years, many research results have been achieved at home and abroad for THz optical switches. In 2010, Yinghao Yuan et al. published "Electrically controlled broadband THz switch based on liquid crystal-filled multi-layer metallic grating structures" on 3rd International Photonics&O...

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Problems solved by technology

[0004] There are many related patents that have been published. In 2010, Hu Ming and others from Tianjin University applied for a patent "A THz Band Vanadium Oxide Optical Switch and Its Manufacturing Method". The patent publication number is CN 101950092A, which is a vanadium oxide thin film Structure, in the space terahertz time-domain spectrum system, the metal characteristics of the vanadium oxide film are used to excite the laser to realize the switching function, the speed is fast and the insertion loss is low, but the extinction ratio is low, only 4.4dB

In 2013, Liu Jianjun and others from China Institute of Metrology applied for a patent "An Optically Controlled Terahertz Wave Switch". To achieve the control function, the required laser power is low but the operation is more complicated

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