title: Spatial quantizing a subwavelength slit to upgrade its optical properties.
abstract: We propose a spatial quantization method to discretize a single subwavelength metallic slit into identical unit chains and investigate its transmission properties. Finite-difference time-domain simulations suggest that the formation of multiple fundamental plasmon resonances and their mutual coupling processes play dominant roles in the quantized structure, which eventually alters the surface plasmon energy propagation into a hopping style. Through adjusting the groove geometrical parameters, the optical transmission can be further increased by as high as about 1000% or suppressed to zero when compared with a corresponding untreated slit. We expect these findings to have potential applications in subwavelength optics.
authors: Institute of Modern Optics, Nankai University, Key Laboratory of Opto-electronic Information Science and Technology, Education Ministry of China, Tianjin, 300071, China.
authors: Yan
authors: Y
authors: Guo
authors: Jianjun
authors: J
authors: Yang
authors: Shengjiang
authors: S
authors: Chang