Tunable multiple plasmon resonances and local field enhancement of nanocrescent/nanoring structure
Wang Bin-Binga), Zhou Jun†a), Chen Donga), Fang Yun-Tuanb), Chen Ming-Yangc)
       
Near-field enhancements of the nanocrescent and the NCNR structures at t = 2 nm and s = 1 nm for various values of gap width g .