Matsui Takayuki, Miyazaki Hideki T, Miura Atsushi, Nomura Tsuyoshi, Fujikawa Hisayoshi, Sato Kazuo, Ikeda Naoki, Tsuya Daiju, Ochiai Masayuki, Sugimoto Yoshimasa, Ozaki Masanori, Hangyo Masanori, Asakawa Kiyoshi
Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan.
Opt Express. 2012 Jul 2;20(14):16092-103. doi: 10.1364/OE.20.016092.
Transmission phase control is experimentally demonstrated using stacked metal-dielectric hole arrays with a two-dimensional geometric design. The transmission phase varies drastically with small frequency shifts due to structural resonances. Laterally propagating surface plasmon polaritons excited by the periodic hole array roughly determine the resonance frequency, whereas localized resonances in each hole determine the dispersion. The transmission phase at various frequencies is directly evaluated using interferometric microscopy, and the formation of an inclined wavefront is demonstrated using a beam steering element in which the hole shapes gradually change in-plane from square to circular.
利用具有二维几何设计的堆叠金属-电介质孔阵列，通过实验证明了传输相位控制。由于结构共振，传输相位会随着微小的频率偏移而急剧变化。由周期性孔阵列激发的横向传播表面等离子体激元大致决定了共振频率，而每个孔中的局部共振决定了色散。使用干涉显微镜直接评估不同频率下的传输相位，并使用一种光束转向元件演示了倾斜波前的形成，在该元件中，孔的形状在平面内从方形逐渐变为圆形。
