Open AccessCharacteristics of a bidirectional multifunction focusing and plasmon-launching lens with multiple periscope-like waveguides
Author(s) -
Tonglu Xing,
Tairong Bai,
Yang Tang,
Zhiyu Lu,
Yulan Huang,
Aliaksei Balmakou,
Jicheng Wang
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.395816
Subject(s) - optics , wavefront , focus (optics) , plasmon , lens (geology) , interference (communication) , physics , waveguide , phase (matter) , computer science , telecommunications , channel (broadcasting) , quantum mechanics
A device incorporating a series of periscope-like waveguides to achieve bidirectional focusing and plasmon launching is proposed. Optimizing the number, positions, and dimensions of the waveguides and tuning the waveguide optical paths both produce the required phase shifts to shape wavefronts and achieve constructive interference at the desired points. Due to the symmetry and reversibility of the structure, the lens can focus the light incident on both sides. Energy redistribution to a specific multi-focus can also be achieved by applying appropriate phase shifts. This simple and high performance structure makes the bidirectional plasmonic launcher easy to implement in various application situations.