Wen-Kang Zhang

Publications (2)4.34 Total impact

• Article: Bragg diffraction of guided optical waves by magnetostatic backward volume waves in a double-layered magnetic film structure

  Wen-Kang Zhang, Gong-Qiang Liu
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  ABSTRACT: The noncollinear interactions between the guided optical wave (GOW) and magnetostatic backward volume wave (MSBVW) in a double-layered magnetic film structure are investigated theoretically. The explicit expressions for the rf magnetization of the MSBVW and the mode conversion efficiency (MCE) of GOW were presented in terms of various geometrical parameters and the rf input power in the case that the insertion loss of the MSBVW is taken into consideration. The effects of the thicknesses of two magnetic layers and a separation layer on the MCE of GOW and magneto-optic (MO) coupling bandwidth are calculated in detail. The MCE of the GOW and the MO bandwidth can be increased significantly in a double-layered magnetic film structure by properly choosing the thicknesses of two magnetic layers and a separation layer. © 2004 American Institute of Physics.
  Journal of Applied Physics 02/2004; · 2.17 Impact Factor
• Article: Excitation and propagation characteristics of magnetostatic backward volume wave in a double-layered film structure with magnetic damping

  Wen-Kang Zhang, Gong-Qiang Liu
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  ABSTRACT: The excitation and propagation characteristics of magnetostatic backward volume wave in a double-layered magnetic film structure with magnetic damping are investigated theoretically. The dispersion, the attenuation constant, and the insertion loss can be decreased and the excitation bandwidth can be increased significantly by using a double-layered structure. The propagation constant and the attenuation constant depend strongly on the physical and geometrical parameters of the magnetic film with large thickness. The excitation characteristics are associated not only with the physical and geometrical parameters of the two magnetic layers and the separation layer, but also with the location and geometrical parameters of the microstrip transducer. The effects of the magnetic damping on the radiation resistance and the propagation constant of the magnetostatic wave (MSW) are weak, and the presence of the magnetic damping mainly leads to the propagation loss of the MSW. In addition, the excitation of the MSW is the main bandwidth-limiting mechanism in a double-layered structure. © 2003 American Institute of Physics.
  Journal of Applied Physics 04/2003; 93(9):5720-5726. · 2.17 Impact Factor