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FERROMAGNETIC MATERIAL AND LARGE BIREFRINGENT LIQUID CRYSTAL MATERIAL INTEGRATED MULTIFUNCTIONAL ADJUSTABLE THZ SOURCE DRIVEN BY BOTH MAGNETIC FIELD AND ELECTRIC FIELD, AND MANUFACTURING METHOD THEREFOR
FERROMAGNETIC MATERIAL AND LARGE BIREFRINGENT LIQUID CRYSTAL MATERIAL INTEGRATED MULTIFUNCTIONAL ADJUSTABLE THZ SOURCE DRIVEN BY BOTH MAGNETIC FIELD AND ELECTRIC FIELD, AND MANUFACTURING METHOD THEREFOR
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机译：磁场和电场共同驱动的铁磁材料和大双折射液晶集成多功能可调节THZ源及其制造方法
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摘要
A ferromagnetic material and large birefringent liquid crystal (LC) material integrated multifunctional adjustable THz source driven by both a magnetic field and an electric field, and a manufacturing method therefor. The THz source comprises a first fused silica substrate (1) and a second fused silica substrate (2) spaced from each other; a cobalt layer and a platinum layer (3) are respectively deposited as ferromagnetic and non-magnetic layers on the first fused silica substrate (1); a few layers of porous graphene (4) are transferred onto the second fused silica substrate (2) by means of a transfer process; the two fused silica substrates is spin-coated with an azo dye SD1 (5) and photoalignment is carried out; a THz large birefringent LC material is loaded to form a uniformly oriented LC layer (6); a polyester film is further provided between the first fused silica substrate (1) and the second fused silica substrate (2) to form a unit having uniform thickness. By means of the electrically controlled birefringence of LC and the anti-spin Hall effect of ferromagnetic heterojunction, the THz phase delay and polarization state can be conveniently controlled by separately adjusting the applied electric field and magnetic field, thereby implementing non-contact conversion between linear polarization and circular polarization of THz wave.
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