Abstract
A waveguide-coupled surface phonon resonance (SPhR) sensor with super-resolution based on Fano resonance (FR) by using a multilayer system within the Kretschmann configuration in the mid-infrared wavelength region is proposed. Due to the coherent interference of the waveguide and the surface phonon polariton modes, the calculated reflectivity spectrum possesses sharp asymmetric FR dips. An ultra-small linewidth is formed because of the Fano coupling, and the physical features contribute to a highly efficient nano-sensor for refractive index sensing. The bulk and surface sensitivity by intensities are greatly enhanced relative to those of conventional SPhR sensors.
© 2016 Optical Society of America
Full Article | PDF ArticleMore Like This
Qiwen Zhao, Chenyi Yao, Ying He, Yanfang Yang, and Huifang Zhang
J. Opt. Soc. Am. B 41(5) 1099-1105 (2024)
Jing Zhang, Bo Jiang, Yibin Song, and Yi Xu
Opt. Express 29(21) 32973-32982 (2021)
Kouki Matsunaga, Takeshi Watanabe, Yoichiro Neo, Takahiro Matsumoto, and Makoto Tomita
Opt. Lett. 41(22) 5274-5277 (2016)