Chen Wei Ting, Wu Pin Chieh, Chen Chen Jung, Chung Hung-Yi, Chau Yuan-Fong, Kuan Chieh-Hsiung, Tsai Din Ping
Department of Physics, National Taiwan University, Taipei, Taiwan.
Opt Express. 2010 Sep 13;18(19):19665-71. doi: 10.1364/OE.18.019665.
The Taiji symbol is a very old schematic representation of two opposing but complementary patterns in oriental civilization. Using electron beam lithography, we fabricated an array of 70 × 70 gold Taiji marks with 30 nm thickness and a total area of 50 × 50 µm(2) on a fused silica substrate. The diameter of each Taiji mark is 500 nm, while the period of the array is 700 nm. Here we present experimental as well as numerical simulation results pertaining to plasmonic resonances of several Taiji nano-structures under normal illumination. We have identified a Taiji structure with a particularly interesting vortex-like Poynting vector profile, which could be attributed to the special shape and dimensions of the Taiji symbol.
太极图是东方文明中一种非常古老的、代表两种对立但互补模式的示意图。我们使用电子束光刻技术，在熔融石英衬底上制作了一个由70×70个金色太极图案组成的阵列，每个图案厚度为30纳米，总面积为50×50平方微米。每个太极图案的直径为500纳米，而阵列的周期为700纳米。在此，我们展示了在正常光照下几种太极纳米结构的等离子体共振的实验和数值模拟结果。我们发现了一种具有特别有趣的涡旋状坡印廷矢量分布的太极结构，这可能归因于太极图的特殊形状和尺寸。
