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Second Harmonic Generation of Antiferromagnetic Sandwich Structure

Author: GaoXinHua
Tutor: WangXuanZhang
School: Harbin Normal University
Course: Theoretical Physics
Keywords: Sandwich structure Antiferromagnetic film Second harmonic generation
CLC: O484.43
Type: Master's thesis
Year: 2009
Downloads: 9
Quote: 0
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Abstract


Calculated antiferromagnetic sandwich structure in the second harmonic generating Voigt bit type and Faraday bit type . The so - called sandwich structure, i.e. the antiferromagnetic layer sandwiched between two layers of dielectric intermediate . Our application is a Voigt and Faraday bit type . Voigt bit type corresponding y- axis perpendicular to the XZ plane parallel to the sandwich surface and the xy plane of the incident plane . Faraday bit corresponding z axis perpendicular to the xy plane is parallel to the surface of the sandwich , the xz plane as the incident plane . The external static magnetic field and antiferromagnetic anisotropic axis along the z axis, and the pumping wave incident obliquely . We calculated the four kinds of system ( SiO 2 / the MnF 2 / ZrO 2 ZrO 2 / MnF < sub > 2 / SiO 2 , SiO 2 / MnF 2 / SiO 2 ,, ZrO < sub> 2 < / sub > / MnF 2 / ZrO 2 < / sub > ) , the second harmonic generated . The main conclusions are as follows : ( 1 ) Voigt -bit incident plane electromagnetic wave can be divided into TE and TM waves TM wave magnetic field perpendicular to the plane of incidence , the TE wave electric field perpendicular to the plane of incidence . The TM wave does not excite the second harmonic . Assume that the pump wave 2 / ZrO the TE wave SiO 2 / MnF 2 system pump wave is reciprocal second harmonic wave non - reciprocal . Select the SiO 2 AR film , the second harmonic maximum occurs at normal incidence of the pump wave . The periodic variation of the second harmonic generating power with the thickness of the antiferromagnetic . (2) Faraday the bit type TE and TM waves excite the second harmonic . TE wave corresponds to the the four resonance frequency , and TM wave corresponding to the two resonance frequencies . The pump wave is a TE wave , SiO 2 / MnF 2 / ZrO 2 , ZrO 2 / MnF < sub> 2 < / sub > / SiO 2 and ZrO 2 / MnF 2 / ZrO 2 at large angles can produce a strong second harmonic of the incident . Pump wave for the TM wave , all system generated second harmonic intensity similar .

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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics > The nature of the films > Magnetic properties
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