title: Strong enhancement of nano-sized circularly polarized light using an aperture antenna with V-groove structures.
abstract: We present a new type of aperture antenna with V-groove structures that are made of Au to enhance strong circularly polarized light (CPL). Simulations using the finite element method revealed that strong CPL was enhanced within the aperture with a diameter of 10 nm. The intensity of the electric field was enhanced and was 22,700 times greater than that of the incident light. The channel plasmon polaritons generated in the V-groove structures were responsible for the strong enhancement. The influence of the angle and length of the V-groove on the enhancement of the CPL was investigated.
authors.forename: Yongfu
authors.initials: Y
authors.lastname: Cai
authors.forename: Soushi
authors.initials: S
authors.lastname: Ikeda
authors.forename: Katsuji
authors.initials: K
authors.lastname: Nakagawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kikuchi
authors.forename: Naoki
authors.initials: N
authors.lastname: Shimidzu
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ishibashi