Caglayan Humeyra, Ozbay Ekmel
Nanotechnology Research Center-NANOTAM, Department of Physics, Bilkent University, Ankara, Turkey.
Opt Express. 2008 Nov 10;16(23):19091-6. doi: 10.1364/oe.16.019091.
We investigated the splitting of surface electromagnetic waves trapped at the output surface of a one-dimensional metallic grating structure. The output gratings of the structure asymmetrically such that the output surfaces at the different sides of the subwavelength aperture can support surface waves at different frequencies. The transmission amplitude as measured at the left side is 1,000 times of that at the right side at 16 GHz. At 24 GHz, the transmission measured at the right side is 20 times that of the left side of the structure. Therefore, surface waves are guided into the different sides of the aperture at different frequencies via metallic gratings. The experimental results are in agreement with the theoretical results.
我们研究了捕获在一维金属光栅结构输出表面的表面电磁波的分裂情况。该结构的输出光栅不对称，使得亚波长孔径不同侧的输出表面能够支持不同频率的表面波。在16吉赫兹时，左侧测得的传输幅度是右侧的1000倍。在24吉赫兹时，右侧测得的传输是该结构左侧的20倍。因此，表面波通过金属光栅在不同频率下被引导到孔径的不同侧。实验结果与理论结果一致。
