title: Interference and horizontal Fabry-Perot resonance on extraordinary transmission through a metallic nanoslit surrounded by grooves.
abstract: The debate on the underlying physics of the extraordinary optical transmission (EOT) through a metallic nano-slit surrounded with periodic grooves is largely resolved. We clarify that the EOT originates from the interference between the slit modes excited by the incident light and by the groove-generated surface plasmon polaritons modulated by the horizontal Fabry-Perot resonance effect due to the surrounding grooves. The quantitative model derived will greatly simplify the design of such structures.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineeringand Computer Science, Peking University, Beijing 100871, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Cai
authors.forename: Guangyuan
authors.initials: G
authors.lastname: Li
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Wang
authors.forename: Anshi
authors.initials: A
authors.lastname: Xu