Open AccessMulticore fiber integrated beam shaping devices for long-range plasmonic trapping
Author(s) -
Mingjie Wang,
Chunying Guan,
Lin Cheng,
Jing Liu,
Jing Yang,
Jinhui Shi,
Zhihai Liu,
Jun Yang,
Libo Yuan
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.435643
Subject(s) - optics , photonic crystal fiber , materials science , plasmon , surface plasmon polariton , optical fiber , optical tweezers , beam (structure) , trapping , optoelectronics , optical force , surface plasmon , physics , ecology , biology
The multicore fiber beam shaping devices based on surface plasmon polaritons (SPPs) have been proposed and demonstrated. The gold film is covered on the end face of the optical fiber. An air slit is perforated in the center of each core and the gratings with a fixed period are designed on the gold film on one side of the slit to obtain a deflected beam. Multiple deflected beams based on the multicore fiber interfere and form a periodic field, where the period of the interference field is determined by the deflection angle of the beams and the spacing between the cores. The interference field of the multiple deflected beams can be used to trap the nanosphere. The Maxwell stress tensor method is used to calculate the transverse and longitudinal trapping forces on a nanosphere. The nanosphere can be stably trapped at 45 μm away from the end face of the fiber. Such an all-fiber trapping system is compact and flexible integration, and is promising for long-working-distance and multiple-particle trapping.