tm波 meaning in English
transverse magnetic field wave
Examples
- The diffraction properties of te and tm polarizations for a beam - sampling g rating are numerically analyzed with this program
利用编写的程序计算并分析了一种用于激光取样光栅te波和tm波的衍射特性。 - The most achievement is that we firstly obtain the analytic accurate solution of the modal fields of the waveguide structure and find some available character : ( 1 ) the different uniaxial crystal materials have the different propagation properties ; ( 2 ) when the optical axis of the crystal is on the plane that is made up of the normal direction of the waveguide plane and the propagation , there are te mode and tm mode in this special waveguide , but the principal mode is different of the character of the uniaxial crystal , the principal mode is the principal mode of te mode for the negative uniaxial crystal , but the one of tm mode for the positive uniaxial crystal ; ( 3 ) when the crystal optical - axis parallel to the waveguide plane , for the positive uniaxial crystal material , the principal mode of the waveguide is a te wave , which can be excited by the light at any frequency ; when the light frequency satisfies a single mode propagation condition , there will be only the principal mode propagating in the waveguide , otherwise some of the higher order modes can be excited , which are neither te modes , nor tm modes , but the hybrid guided modes
本文就是在此背景下，利用金属波导和单轴晶体的一些特性，结合麦克斯韦方程组和波导的边界条件，从三种不同的情况研究了光在对称平面单轴晶体金属波导(波导层是单轴晶体，两个波导界面均为金属)内的传输特性，其主要贡献为，首次解析地得到了这种波导结构下模式场的精确解，并发现了一些有用的特性： ( 1 )模式场的性质因单轴晶体的性质不同而异； ( 2 )当单轴晶体光轴位于波导界面法方向与传输方向构成的平面内时，波导中传输te波和tm波，只不过其主模因单轴晶体的性质不同而异，当波导层介质为负单轴晶体时，波导主模是te波主模，而波导层介质为正单轴晶体时波导主模是tm波主模。 ( 3 )当单轴晶体光轴位于波导面内时，对于正单轴晶体，波导的主模是横电波te _ 0模，任何频率的光波均可激励该模式；当光波波长满足一定条件时，波导内传输单模，否则，将激励起高阶模式，高阶模即匪te波，也匪tm波，而是两者耦合而成的混合模。 - A reflective polarizer based on a double - layer subwavelength metal - dielectric grating structure is presented here . numerical simulations show that at normal incidence , this polarizer reflects light polarized perpendicular to the grating lines ( transverse magnetic polarization ) , but strongly absorbs parallel - polarized light ( transverse electric polarization ) . the polarization extinction ratio is very high
理论计算表明，零角度入射时，该光栅结构在可见波段对tm波有很高的反射率，而对te波强烈吸收，即可获得很高的反射光偏振比，可以作为理想的集成偏振器件。