Li, Ziyuan; Hattori, Haroldo; Parkinson, Patrick; Tian, Jie; Fu, Lan; Tan, Hoe Hark; Jagadish, Chennupati
In this paper, a staircase plasmonic nano-antenna device is analysed both theoretically and experimentally. The tapered nano-antenna cavity with a grating leads to electric field enhancement factor (EF) as high as 31 close to 830nm. The integration of a metallic grating aids the coupling of light coming from the vertical direction to the nano-antenna, increasing the electric field in the nano-antenna by a factor of 3. The smallest air gap width between the metallic regions of the fabricated...[Show more]
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