Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore.
Sci Rep. 2016 May 5;6:25576. doi: 10.1038/srep25576.
Localized spoof surface plasmon polaritons (spoof-SPPs) in a graded spoof-plasmonic resonator chain with linearly increasing spacing are experimentally investigated at microwave frequencies. Transmission measurements and direct near-field mappings on this graded chain show that the propagation of localized spoof-SPPs can be cutoff at different positions along the graded chain under different frequencies due to the graded coupling between adjacent resonators. This mechanism can be used to guide localized spoof-SPPs in the graded chain to specific positions depending on the frequency and thereby implement a device that can work as a selective switch in integrated plasmonic circuits.
在微波频率下，实验研究了具有线性增加间距的梯度赝等离子体谐振器链中的局域赝表面等离激元（spoof-SPP）。在这个梯度链上进行的传输测量和直接近场映射表明，由于相邻谐振器之间的渐变耦合，局域 spoof-SPP 的传播可以在不同频率下沿梯度链的不同位置被截止。这种机制可以根据频率将局域 spoof-SPP 引导到梯度链中的特定位置，从而实现一种可以作为集成等离子体电路中的选择性开关的器件。
