| Ya-wei Wang,Yu-jiao Chen,Zeng-hui Meng,Xue-fu Shang,Wei-feng Jin,Min Bu,Yuan-yuan Xu,Xing-long Zhu.Effects on extraordinary transmission of TE wave through varying structure of sub-wavelength metallic gratings without host media[J].Optoelectronics Letters,2013,9(1):77-80 |
| Effects on extraordinary transmission of TE wave through varying structure of sub-wavelength metallic gratings without host media |
| Author Name | Affiliation | E-mail | | Ya-wei Wang | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China
School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China | | | Yu-jiao Chen | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China | chenyujiao993@163.com | | Zeng-hui Meng | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China | | | Xue-fu Shang | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China | | | Wei-feng Jin | School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China | | | Min Bu | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China | | | Yuan-yuan Xu | Faculty of Science, Jiangsu University, Zhenjiang, 212013, China | | | Xing-long Zhu | School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, China | |
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| Abstract: |
| A model of sub-wavelength metallic grating without host media is proposed. Under the excitation of TE polarized light, the extraordinary transmission is also found, and their transmission energy distributions corresponding to different structural parameters of this model are calculated systematically by using finite difference time domain (FDTD) method. The influence of slit width, grating thickness and grating period on the location of transmission peak is obtained. By studying these relations, it is found that Fabry-Perot-like (FPL) effect of the slit is the main physical reason of this extraordinary transmission. Varying the slit width can cause the change of reflection phase transition at both ends, and then the characteristics of FPL resonance of slit cavity are affected. The surface mode of metallic gratings has less effect on the location of transmission peak. |
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