Open AccessSpatiotemporal manipulation on focusing and propagation of surface plasmon polariton pulses
Author(s) -
Yulong Wang,
Changjun Min,
Yuquan Zhang,
Jie Xu,
Fu Feng,
Ling Li,
Xiaocong Yuan
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.405803
Subject(s) - ultrashort pulse , femtosecond , surface plasmon polariton , optics , plasmon , surface plasmon , wavefront , nanophotonics , femtosecond pulse shaping , pulse (music) , photonics , optoelectronics , materials science , kerr effect , dispersion (optics) , laser , physics , nonlinear system , quantum mechanics , detector
Surface plasmon polariton (SPP) provides an important platform for the design of various nanophotonic devices. However, it is still a big challenge to achieve spatiotemporal manipulation of SPP under both spatially nanoscale and temporally ultrafast conditions. Here, we propose a method of spatiotemporal manipulation of SPP pulse in a plasmonic focusing structure illuminated by a dispersed femtosecond light. Based on dispersion effect of SPP pulse, we achieve the functions of dynamically controlled wavefront rotation in SPP focusing and redirection in SPP propagation within femtosecond range. The influences of structural parameters on the spatiotemporal properties of SPP pulse are numerically studied, and an analytical model is built to explain the results. The spatiotemporal coupling of modulated SPP pulses to dielectric waveguides is also investigated, demonstrating an ultrafast turning of propagation direction. This work has great potential in applications such as on-chip ultrafast photonic information processing, ultrafast beam shaping and attosecond pulse generation.