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Published on: October 11, 2016
Finite-size nondiffracting beam from a subwavelength metallic hole with concentric dielectric gratings
Hwi Kim1, Junghyun Park, Byoungho Lee
1National Creative Research Center for Active Plasmonics Application Systems, Inter-UniversitySemiconductor Research Center and School of Electrical Engineering, Seoul NationalUniversity, Gwanak-Gu Gwanakro 599, Seoul 151-744, South Korea.
Abstract:
We show that finite-size nondiffracting beams can be generated by a subwavelength metallic hole with surrounding dielectric grating structures. An analytic field model that describes the diffractive formation of finite-size nondiffracting beams is addressed. The generation of finite-size nondiffracting beams from a subwavelength metallic hole with surrounding concentric dielectric binary gratings is numerically demonstrated by three-dimensional rigorous coupled wave analysis.
