Terahertz wave polarization beam splitter with trapezoidal structures loaded on borders

Abstract

The invention discloses a terahertz wave polarization beam splitter with trapezoidal structures loaded on the borders. The terahertz wave polarization beam splitter comprises a signal input terminal, a first signal output terminal, a second signal output terminal, a far infrared quartz glass matrix and a polarization beam splitting piece; the polarization beam splitting piece is arranged on the far infrared quartz glass matrix; the polarization beam splitting piece comprises a left side narrow rectangular polarization silicon waveguide, a right side wide rectangular polarization silicon waveguide, an upper side rectangular polarization silicon waveguide, a lower side rectangular polarization silicon waveguide, a long trapezoidal polarization silicon waveguide and a short trapezoidal polarization silicon waveguide; signals are vertically emitted from the signal input terminal and pass through the polarization beam splitting piece; the first signal output terminal outputs TE waves; and the second signal output terminal outputs TM waves, so that polarization beam splitting performance is obtained. The terahertz wave polarization beam splitter has the advantages of simple structure, high beam splitting rate, small dimension, low cost, convenience in manufacture and the like.

Description

technical field [0001] The invention relates to a beam splitter, in particular to a frame-loaded trapezoidal structure terahertz wave polarization beam splitter. Background technique [0002] Terahertz waves are electromagnetic waves with a frequency range of 0.1-10 THz (wavelength range of 30 μm to 3 mm). This band is located between microwaves and infrared radiation, and is the marginal area of ​​electromagnetics and optics research. The early research on terahertz radiation can be traced back to the beginning of the last century. Before the 1980s, due to the lack of effective methods for generating and detecting electromagnetic waves in the terahertz frequency band, the research on electromagnetic waves in this frequency band developed very slowly. The understanding of radiation properties is very limited, and in recent decades, with the rapid development of ultrafast optoelectronic technology, a stable excitation light source has been provided for the generation of terah...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the disadvantages of relatively low beam splitting ratio, complex structure, difficult actual manufacturing process and high cost in the prior art, the present invention provides a frame-loaded trapezoidal structure terahertz wave polarization beam splitter

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