Park Tae-Ho, Mirin Nikolay, Lassiter J Britt, Nehl Colleen L, Halas Naomi J, Nordlander Peter
Department of Physics and Astronomy, M.S. 61, Laboratory for Nanophotonics, Rice University, Houston, Texas 77005-1892, USA.
ACS Nano. 2008 Jan;2(1):25-32. doi: 10.1021/nn700292y.
Subwavelength holes are one of the most important structures in nanophotonics, providing a useful geometry for nanosensing and giving rise to extraordinary transmission when patterned in arrays. Here we theoretically and experimentally examine the optical properties of an individual nanohole in a thin metallic film. In contrast to localized plasmonic nanostructures with their own characteristic resonances, nanoholes provide a site for excitation of the underlying thin film surface plasmons. We show that both hole diameter and film thickness determine the energy of the optical resonance. A theoretical dispersion curve was obtained and verified using spectral measurements of individual nanoholes.
亚波长孔是纳米光子学中最重要的结构之一，为纳米传感提供了一种有用的几何结构，并且当以阵列形式图案化时会产生异常透射。在这里，我们通过理论和实验研究了薄金属膜中单个纳米孔的光学性质。与具有自身特征共振的局域等离激元纳米结构不同，纳米孔为激发其下方的薄膜表面等离激元提供了一个位点。我们表明，孔径和膜厚都决定了光学共振的能量。通过对单个纳米孔的光谱测量获得并验证了一条理论色散曲线。
