title: Plasmonic wave plate based on subwavelength nanoslits.
abstract: We propose a quarter-wave plate based on nanoslits and analyze it using a semianalytical theory and simulations. The device comprises two nanoslits arranged perpendicular to one another where the phases of the fields transmitted by the nanoslits differ by λ/4. In this way, the polarization state of the incident light can be changed from linear to circular or vice versa. The plasmonic nanoslit wave plate is thin and has a subwavelength lateral extent. We show that the predictions for the phase shift obtained from a semianalytical model are in very good agreement with simulations by the finite difference time domain method.
authors: School of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA. khooeh@ihpc.a-star.edu.sg
authors: Eng Huat
authors: EH
authors: Khoo
authors: Er Ping
authors: EP
authors: Li
authors: Kenneth B
authors: KB
authors: Crozier