Terahertz wave polarizing beam splitter based on various dielectric pillar structures

Abstract

The invention discloses a terahertz wave polarization beam splitter based on multiple dielectric cylinder structures. The terahertz wave polarization beam splitter comprises first dielectric cylinder photonic crystal and second dielectric cylinder photonic crystal which are arranged in a two-dimensional period, and a signal input end, a first signal output end, a second signal output end, a first elliptical photonic crystal dielectric cylinder array, a second elliptical photonic crystal dielectric cylinder array, a first coupling photonic crystal dielectric cylinder, a second coupling photonic crystal dielectric cylinder, a first photonic crystal array, a second photonic crystal array, a third photonic crystal array and a fourth photonic crystal array which are arranged between the first dielectric cylinder photonic crystal and the second dielectric cylinder photonic crystal. Signals are inputted from the signal input end. The first signal output end outputs TM wave, and the second signal output end outputs TE wave so that polarization beam splitting performance is acquired. The terahertz wave polarization beam splitter based on the multiple dielectric cylinder structures has advantages of being simple in structure, adjustable, high in beam splitting rate, small in size, low in cost and easy to integrate.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a terahertz wave polarization beam splitter based on various dielectric column structures. Background technique [0002] In recent years, the terahertz wave between the mature millimeter wave and infrared light on the electromagnetic spectrum is undoubtedly a new research field. The frequency of terahertz waves is 0.1~10THz, and the wavelength is 30µm~3mm. For a long time, due to the lack of effective terahertz wave generation and detection methods, compared with traditional microwave technology and optical technology, people have little understanding of the nature of electromagnetic radiation in this band, so that this band has become the terahertz wave in the electromagnetic spectrum. void. With the breakthrough of terahertz radiation source and detection technology, the unique and superior characteristics of terahertz have been discovered and have shown great application prospects in mater...

AI Technical Summary

Problems solved by technology

However, most of the existing terahertz wave polarization beam splitters have many shortcomings such as complex structure, low polarization beam splitting efficiency, and high cost. Therefore, research on simple structure, high polarization beam splitting efficiency, low cost, small size, and adjustable performance Terahertz wave polarizing beam splitter is of great significance

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