Slow wave structure based on semiconductor-filled metal waveguide structure

Abstract

The invention discloses a slow wave structure based on a semiconductor-filled metal waveguide structure. The slow wave structure comprises a uniform metal hollow waveguide pipe wall, an air gap and a conical filled high-refractive index semiconductor medium strip. In the slow wave structure, by utilizing the abnormal characteristic that the direction of energy flow in the air gap is opposite to that of energy flow in media when electromagnetic waves are transmitted in a high-refractive index semiconductor-filled waveguide structure and selecting parameters of the waveguide structure reasonably, the average energy flow of the electromagnetic waves with different frequencies in air and the average energy flow of the electromagnetic waves with different frequencies in a semiconductor at the corresponding position of waveguide are approximate, so the electromagnetic waves have extremely low group velocity. When the electromagnetic waves enter a port and are transmitted along the waveguide, the group velocity of the electromagnetic waves is reduced gradually, and the energy of the electromagnetic waves is enhanced gradually until the electromagnetic waves reach specific parts corresponding to the frequencies; and waveguide parts in which the electromagnetic waves with the different frequencies can reach are different from one another, so the frequency division, field restriction and reinforcing effects of the electromagnetic waves are realized simultaneously by the structure.

Description

technical field [0001] The invention relates to the fields of physical electronic devices and terahertz wave devices, in particular to a slow-wave structure in devices or devices that can be used for the interaction between low-speed electromagnetic waves and electrons or other substances. Background technique [0002] Due to the slow speed of electromagnetic waves propagating in the slow wave structure, the interaction between electromagnetic waves and matter is greatly enhanced, which makes the slow wave structure play an important role in sensing, amplification, source and miniaturized devices in the field of microwave and terahertz waves. For example, the slow wave structure in the microwave field is mainly used in traveling wave amplifiers, particle accelerators and other devices. In some wedge-shaped or tapered slow-wave structures, different frequencies of the guided wave can stagnate and intensify at different parts of the structure, forming the so-called "constraine...

AI Technical Summary

Problems solved by technology

Most of these slow-wave structures need to introduce fine periodic structures or resonant cavity structures, which brings difficulties to the preparation of slow-wave devices (especially high-frequency electromagnetic wave devices), and the gaps and process errors of periodic structures will increase the impact on electromagnetic waves. Scattering loss, and difficult to couple

Although the slow-wave waveguide structure composed of artificial composite electromagnetic media such as left-handed media no longer needs a periodic structure and a resonant cavity structure, the medium itself is a periodic composite structure, which is extremely difficult to prepare and has a large loss for slow waves. Such a structure with ideal slow-wave properties is difficult to practically prepare

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