椭圆偏振光在反射型磁光光子晶体中的传输
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摘要
利用4×4传输矩阵法研究椭圆偏振光在反射型一维磁光光子晶体中的传输特性.设计一种反射型一维磁光光子晶体的结构模型,讨论反射光偏振态的磁场调控特性,分析外加磁场的强度和方向对反射光偏振态的影响.结果表明:改变外加磁场的强度和方向,磁光材料的介电常数发生改变;随着外加磁场强度的增大,磁光材料的相对介电常数ε_M中的ε_2的值在(0～0.009)变化,反射率逐渐增大,反射的椭圆偏振光的偏振态发生改变;随着外加磁场与光轴的夹角φ在(0°～90°)变化,反射率逐渐减小,反射的椭圆偏振光的偏振态发生改变;通过调节外加磁场的强度和方向,可以实现对反射椭圆偏振光偏振态的调控.
The transmission characteristics of elliptically polarized light in reflection-type one-dimensional magneto-optical photonic crystals are studied by using the 4 × 4 transmission matrix method. A structure model of reflection-type one-dimensional magneto-optic photonic crystal is designed, then the characteristics of magnetic field control for polarization of reflected light are discussed, and the influence of the intensity and direction of the external magnetic field on the polarization of reflected light is analyzed. The results show that the dielectric constant of magneto-optic materials is changed by changing the intensity and direction of the applied magnetic field; with the increase of the intensity of the applied magnetic field, the value of ε_2 in the relative dielectric constant ε_M of magneto-optic materials is increased from 0 to 0.009, the reflectivity is increased, and the polarization state of the reflected elliptically polarized light is changed; with the angle φ between the external magnetic field and the optical axis is increased from 0 to 90 degrees, the reflectivity is decreased, and the polarization state of the reflected elliptically polarized light is changed. By adjusting the intensity and direction of the external magnetic field, the polarization state of the reflected elliptically polarized light can be adjusted.
The transmission characteristics of elliptically polarized light in reflection-type one-dimensional magneto-optical photonic crystals are studied by using the 4 × 4 transmission matrix method. A structure model of reflection-type one-dimensional magneto-optic photonic crystal is designed, then the characteristics of magnetic field control for polarization of reflected light are discussed, and the influence of the intensity and direction of the external magnetic field on the polarization of reflected light is analyzed. The results show that the dielectric constant of magneto-optic materials is changed by changing the intensity and direction of the applied magnetic field; with the increase of the intensity of the applied magnetic field, the value of ε_2 in the relative dielectric constant ε_M of magneto-optic materials is increased from 0 to 0.009, the reflectivity is increased, and the polarization state of the reflected elliptically polarized light is changed; with the angle φ between the external magnetic field and the optical axis is increased from 0 to 90 degrees, the reflectivity is decreased, and the polarization state of the reflected elliptically polarized light is changed. By adjusting the intensity and direction of the external magnetic field, the polarization state of the reflected elliptically polarized light can be adjusted.
引文
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[19] 李镇.磁性光子晶体非互易传输特性研究[D].南京:南京大学,2015.
[2] Ghanaatshoar M,Zamani M.Magneto-optical Magnetic Field Sensors Based on Compact Magnetophotonic Crystals[J].Journal of Superconductivity & Novel Magnetism,2015,28(4):1365-1370.
[3] Inoue M,Fujii T.A theoretical analysis of magneto-optical Faraday effect of YIG films with random multilayer structures[J].Journal of Applied Physics,1997,81(8):5659-5661.
[4] Sharifian M,Ghadiri H,Zamani M,et al.Influence of thickness error on the operation of adjustable magneto-optical isolators.[J].Applied Optics,2012,51(20):4873.
[5] 徐海燕.大入射角磁光光子晶体宽带光隔离器的研究[D].南京:南京邮电大学,2016.
[6] 宦杰.低介电常数超材料在磁光隔离器中的应用[D].南京:南京邮电大学,2016.
[7] 王纪俊,朱志盼,卢立中,等.椭圆偏振光在各向异性1维光子晶体中的传输[J].激光技术,2012,36(6):818-821.
[8] Kato H,Inoue M.Reflection-mode operation of one-dimensional magnetophotonic crystals for use in film-based magneto-optical isolator devices[J].Journal of Applied Physics,2002,91(10):7017-7019.
[9] 温晓文,李国俊,仇高新,等.反射型磁光多层膜隔离器工作稳定性的研究[J].物理学报,2005,54(4):1847-1853.
[10] Zamani M,Ghanaatshoar M.High performance reflection-type 1D magnetophotonic crystals with flat-top responses[J].Photonics & Nanostructures Fundamentals & Applications,2013,11(3):234-240.
[11] 宦杰,杨晓霞,陶志阔,等.低介电常数超材料在反射型磁光隔离器中的应用[J].光子学报,2017(s1):49-53.
[12] Berreman D W.Optics in stratified and anisotropic media:4×4-matrix formulation[J].Journal of the Optical Society of America,1972,62(4):502-510.
[13] Chen C J,Lien A,Nathan M I.4 × 4 and 2 × 2 matrix formulations for the optics in stratified and biaxial media[J].Journal of the Optical Society of America A,1997,14(11):3125-3134.
[14] 尹承平,王同标,汪河洲,等.一维磁光光子晶体的光学特性研究[J].量子光学学报,2010,16(3):202-208.
[15] Fei H,Wu J,Yang Y,et al.Magneto-optical isolators with flat-top responses based on one-dimensional magneto-photonic crystals[J].Photonics and Nanostructures-Fundamentals and Applications,2015,17:15-21.
[16] Zamani M,Ghanaatshoar M.Design and error analysis of adjustable reflection-type magneto-optical photonic crystals for optical isolator application[J].Journal of Magnetism and Magnetic Materials,2014,358:76-81.
[17] 费宏明,武建加,杨毅彪,等.一维磁光子晶体实现光隔离的应用研究[J].光子学报,2014,43(10):54-57.
[18] Zamani M,Ghanaatshoar M,Alisafaee H.Compact one-dimensional magnetophotonic crystals with simultaneous large Faraday rotation and high transmittance[J].Journal of Modern Optics,2012,59(2):126-130.
[19] 李镇.磁性光子晶体非互易传输特性研究[D].南京:南京大学,2015.