A temperature-controlled switch based on the principle of polarization conversion and phase change

Abstract

The invention belongs to the technical field of novel artificial metamaterials, and particularly relates to a temperature control switch based on polarization conversion and the phase change principle. According to the temperature control switch based on the polarization conversion and the phase change principle, control over transmission of electromagnetic waves is achieved, particularly, control over transmission of cross polarization of the electromagnetic waves is achieved, and the starting / stopping function on transmission of cross polarization of the electromagnetic waves is achieved in a temperature control mode. The temperature control switch based on the polarization conversion and the phase change principle comprises a dielectric layer and two artificial-metamaterial layers. The two artificial-metamaterial layers are located on the surfaces of the two sides of the dielectric layer respectively. Each artificial-metamaterial layer is formed by periodically-arranged artificial metamaterial basic units. The basic units of the artificial-metamaterial layers are of E-type metal structures composed of metal strips and strip-shaped phase change material structures. Strip-shaped phase change materials are located in gaps of the E-type metal structures. The lengths of the strip-shaped phase change materials are the same as the widths of the E-type metal strips. The temperature control switch is a linearly polarized light conversion switch which can effectively work within a wide frequency spectrum range and is particularly suitable for multiple frequency bands.

Description

technical field [0001] The invention belongs to the technical field of new artificial electromagnetic materials, and specifically relates to the transmission control of electromagnetic waves, especially to control the transmission of cross-polarization of electromagnetic waves, and realize the on / off function of cross-polarization transmission of electromagnetic waves by means of temperature control. Variable principle temperature control switch. Background technique [0002] In 1959, Morin observed for the first time at Bell Laboratories that the low-valence oxides of vanadium have a phase transition from semiconductor to metal during heating. For more than half a century, scientists have discovered that there are many kinds of vanadium oxides that have a transition from semiconductor to metal. Characterization of the low-temperature semiconducting phase to high-temperature metallic phase transition. Among them, vanadium dioxide has attracted wide attention because its the...

AI Technical Summary

Problems solved by technology

However, in the study of this temperature-controlled terahertz wave new artificial electromagnetic material, the temperature control method can only achieve 80% of the change in energy transmission efficiency, the minimum transmission efficiency is greater than 10%, the tunability and modulation depth are small, and there is no significant switching. Effect, the research mainly modulates the transmission of co-polarization, does not involve the phenomenon of polarization conversion, and is seriously affected by the background noise of the same polarization state

In the field of research on the combination of new artificial electromagnetic materials and phase change materials, there are no relevant literature and patents on temperature-controlled switching devices based on electromagnetic wave cross-polarization transmission.

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