Double-S-shaped terahertz wave polarization beam splitter

Abstract

The invention discloses a double-S-shaped terahertz wave polarization beam splitter which comprises a signal input end, a first signal output end, a second signal output end, a base body, a first horizontal straight waveguide, a second horizontal straight waveguide, a third horizontal straight waveguide, a fourth horizontal straight waveguide, a reversed isosceles trapezoid waveguide, a first longitudinal waveguide, a second longitudinal waveguide, an S-shaped waveguide and a reversed-S-shaped waveguide. The first horizontal straight waveguide, the second horizontal straight waveguide, the third horizontal straight waveguide, the fourth horizontal straight waveguide, the reversed isosceles trapezoid waveguide, the first longitudinal waveguide, the second longitudinal waveguide, the S-shaped waveguide and the reversed-S-shaped waveguide are positioned on the base body. Terahertz wave can be input from the signal input end, transverse electric (TE) wave can be directly output from the first signal output end, and transverse magnetic (TM) wave can be output from the second signal output end to obtain the polarization beam splitting function. The double-S-shaped terahertz wave polarization beam splitter has the advantages of being compact in structure, high in beam splitting rate, small in size, convenient to manufacture, easy to integrate and the like and meeting application requirements of fields of terahertz wave medical imaging, terahertz wave communication and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a double S-shaped terahertz wave polarization beam splitter. Background technique [0002] With the development of ultrafast laser technology and the further deepening of people's understanding of terahertz band and pulsed light source, terahertz technology, as a new and rapidly developing technology, has attracted much attention in many fields. Especially in medical diagnosis, biotechnology, object imaging, information fields, etc., terahertz technology has been applied and has shown broad application prospects. Terahertz waves have the following properties: (1) Transient: The typical pulse width of terahertz pulses is on the order of picoseconds, which can not only facilitate time-resolved research, but also effectively suppress background radiation noise interference through sampling measurement techniques. (2) Broadband: Terahertz pulse sources usually include several periods of electromag...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a double S-shaped terahertz wave polarization beam splitter with high beam splitting rate in order to overcome the disadvantages of low beam splitting rate, large volume, complex structure and difficult actual manufacturing process in the prior art

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