We report the observation of an ultra-narrow band plasmon induced transparency resonance which is realized in a large area hybrid plasmon-waveguide system consisting of a gold nanowire array embedded in a slab waveguide. Due to the destructive interference between optical modes supported by the hybrid system, an ultra-narrow plasmon induced transparency resonance with a bandwidth of 8 nm at the wavelength of 966 nm was obtained (i.e., ∼1/120 of the peak wavelength at the incident angle of 60°). The group velocity is estimated to be ∼76, which is promising for miniaturized slow-light components.
Observation of ultra-narrow band plasmon induced transparency based on large-area hybrid plasmon-waveguide systems
Jing Zhang, Wenli Bai, Likang Cai, Yun Xu, Guofeng Song, Qiaoqiang Gan; Observation of ultra-narrow band plasmon induced transparency based on large-area hybrid plasmon-waveguide systems. Appl. Phys. Lett. 31 October 2011; 99 (18): 181120. https://doi.org/10.1063/1.3659309
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