caa a22 4500 606243801 CHVBK 20210128101326.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s12596-014-0228-3 doi (NATIONALLICENCE)springer-10.1007/s12596-014-0228-3 Study on the transmission properties of sub-wavelength metallic tapered gratings with different-shaped walls [Elektronische Daten] [Yusheng Zhai, Qilong Wang, Xiaohua Li, Xinquan Chen, Qianqian Huang, Jun Xia] Sub-wavelength metallic tapered gratings with different-shaped slit walls are proposed in this research report. The transmission properties of the gratings have been investigated by finite difference time domain (FDTD) method. The simulation indicates that the transmission spectra strongly depend on the shapes of the slit walls. For TM-polarized light with normal incidence, the transmission coefficient and the bandwidth in the tapered gratings with the concave-parabolic slit walls are larger compared with the gratings with the convex-parabolic walls. For TE polarized light with normal incidence, the simulated results are reverse. In the visible range, the valley positions or peak positions of the transmission spectra are almost unchanged for all the gratings with different-shaped slit walls. The interaction of the electromagnetic (EM) waves on the slit walls with impendence match model has also been proposed in this paper. The Optical Society of India, 2014 Metallic grating nationallicence Sub-wavelength nationallicence Extraordinary optical transmission nationallicence Zhai Yusheng School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Wang Qilong School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Li Xiaohua School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Chen Xinquan School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Huang Qianqian School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Xia Jun School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut Journal of Optics Springer India 44/1(2015-03-01), 20-25 0972-8821 44:1<20 2015 44 12596 https://doi.org/10.1007/s12596-014-0228-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-014-0228-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhai Yusheng School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Wang Qilong School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Li Xiaohua School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Chen Xinquan School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Huang Qianqian School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 700 1- Xia Jun School of Electronic Science and Engineering, Southeast University, 210096, Nanjing, China aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/1(2015-03-01), 20-25 0972-8821 44:1<20 2015 44 12596