Terahertz wave adjustable narrow band filter based on silicon-based photonic crystal structure

Abstract

The invention discloses a terahertz wave adjustable narrow band filter based on a silicon-based photonic crystal structure. The filter comprises a filter metal shell, uniform high-resistance silicon wafers, annular gaskets, a spring piece, a driving motor, a lead, a motor driving controller, a translation table and a hollow push post, wherein one end of the filter metal shell is provided with a vertical edgefold inwardly; a plurality of groups of uniform high-resistance silicon wafers and annular gaskets are uniformly arranged at intervals in the filter metal shell, then the spring piece is arranged in the filter metal shell, and the same quantity of groups of uniform high-resistance silicon wafers and annular gaskets are arranged at intervals in the filter metal shell again; the hollow push post is sleeved in the other end of the filter metal shell; the outer end of the hollow push post is fixed on the translation table; a translation table base is fixed with the metal shell; the translation table is driven to shift by using the driving motor; and the motor driving controller is used for controlling the driving motor through the lead. The terahertz wave adjustable narrow band filter has the advantages of simple structure, low cost, extremely narrow filtering bandwidth, small loss, wide frequency adjustable range, high modulating speed and high performance.

Description

technical field

[0001] The invention relates to the field of terahertz wave technology and wireless communication devices, in particular to a terahertz wave tunable narrow-band filter based on a silicon-based photonic crystal structure. Background technique

[0002] Terahertz (THz) wave connects the microwave and infrared light bands in the frequency band. It has low photon energy, can penetrate most non-polar molecular materials, high spatial resolution, and wide bandwidth. Therefore, it is widely used in detection, security, imaging and It has a good application prospect in communication. Although terahertz wave technology has achieved great development in recent years, conventional microwave electronic devices cannot be used in the terahertz wave band due to the extremely high frequency of terahertz waves relative to microwaves, and its relative light wavelength is too long, making optical Most optical devices in the field are also difficult to apply, and most optical ma...

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