A spoof surface WGM sensor based on a textured PEC cylinder
1 Wireless Innovation Lab of Yunnan University - Kunming 650091, China
2 Yunnnan Copper Group Co., Ltd. - Kunming 650051, China
Received: 30 March 2013
Accepted: 10 August 2013
Based on the negative permittivity properties of a two-dimensional (2D) textured perfect electric conductor (PEC) cylinder, we design a spoof surface whispering gallery mode (WGM) sensor at microwave band. The sensitivity of the proposed sensor is much higher than that of the traditional dielectric sensor in the same geometry size. Importantly, we show that the physical origin for the improvement of sensitivity is the evanescent-wave amplification and local field enhancement effects. This may open up an avenue for designing metamaterial sensors with superior sensitivity.
PACS: 42.60.Da – Resonators, cavities, amplifiers, arrays, and rings / 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials / 04.30.Nk – Wave propagation and interactions
© EPLA, 2013