We study transmission properties in configurations composed of two single metal gratings with different thicknesses. Choosing the perfect electric conductor excludes the influence of intrinsic material dispersion on transmission behaviors; and as such, we aim to reveal the contribution of geometric dispersion to electromagnetic transmission. Transmission suppression line, instead of a transmission suppression point, is discovered, denoting the curve of the wavelength versus the interval or the lateral displacement between the two single gratings when the transmission suppression appears. A simplified model is proposed to comprehend the underlying physics of this special phenomenon.
© 2010 Chinese Optics Letters
Ji Xu, Chen Cheng, Zhu Zheng, Jing Chen, Qiang Bai, Cong Liu, and Huitian Wang, "Electromagnetic transmission in configurations composed of two one-dimensional perfect electric conductor metal gratings," Chin. Opt. Lett. 8, 807-810 (2010)