Guided-wave Resonance Transmission in One-dimensional Metallic Gratings with Surface Impedances on Its Walls of Slits
The resonances coupling between the incident light and surface plasmons as well as guided-wave resonance were pointed out to be the two major physical processes causing the extraordinary transmission of one-dimensionally lamellar gratings with sub-wavelength slits. To pinpoint the dominant one between the two major physical processes, we consider here the scattering of TE-polarized plane wave (with its electric field along the groove direction) by a 1D grating made of perfect metal, but with surface impedance on the side walls of the sub-wavelength slits. It is shown that a frequency-selective transmission can take place even at long wavelengths, and such a phenomenon can be related to the dispersion characteristic of the slit channel with surface-impedance walls where a surface-wave mode exists without cutoff frequency. By examining the phase angle of the surface-wave mode propagating in the slit channel, the frequency-selective transmission is verified to be mainly attributed to the Fabry-Perot resonance of the surface-wave mode.
Ruey Bing (Raybeam) Hwang
Department of Electrical Engineering, Chiao-Tung University 1001, Ta-Hsueh Road, Hsinchu, Taiwan China
国际会议
2010 International Conference on Communications,Circuits and Systems(2010年通信、电路与系统国际会议)
成都
英文
642-646
2010-06-28（万方平台首次上网日期，不代表论文的发表时间）