Abstract
Plasmonic bending beams, which preserve their spatial shapes while propagating along curved trajectories in metal-dielectric interface, offer important applications in the fields of fiber sensor, optical trapping, and micro-nano manipulation. In this work, circular hole array, as a local point-like sources of surface plasmon polaritons, is designed on the metal film to generate multiple plasmonic bending beams. The electric field intensity of multiple plasmonic bending beams is controlled by polarization angle of input light. In addition, the electric filed intensity of multiple plasmonic bending beams relies on circle hole radius. These findings provide guidance in the design and optimization of plasmonic bending beam generators.
Highlights
Surface plasmon polaritons (SPPs) are electromagnetic waves in two-dimensional system, that consist of collective electron oscillations in metal-dielectric interface decay, their diffraction limits can be surpassed [1, 2], thereby offering important applications in the fields of photonics and electronics [3,4,5]
These results demonstrate that multiple plasmonic bending beams are generated by especially designed circular hole arrays
The goodness for beams I, II, and III is 0.969, 0.963, and 0.977, respectively. These results demonstrate that the electric field intensity of multiple plasmonic bending beams (I, II, and III) are controlled by the polarization angle of incident light, which provides a method of dynamic controlling and arbitrarily selecting multiple plasmonic bending beams
Summary
Surface plasmon polaritons (SPPs) are electromagnetic waves in two-dimensional system, that consist of collective electron oscillations in metal-dielectric interface decay, their diffraction limits can be surpassed [1, 2], thereby offering important applications in the fields of photonics and electronics [3,4,5]. As a specific SPP waves, which preserve their shapes while propagating along desired curved trajectories in metal-dielectric interface, are attracting increased attention They offer potential applications in the fields of optical trapping [4,5,6] and micro-nano manipulation [7,8,9]. Ring-shaped hologram consisting of slit-pair array was designed to achieve switchable SPPs [37] All of these reports demonstrate that phase and amplitude of the generation SPP beams can be independently controlled by polarization-sensitive nanostructures. The dependence of the intensity of the electric fields of multiple plasmonic bending beams on the radius of circular hole is studied All these findings can provide deep applications in designing polarization-controlled plasmonic bending beam generators or polarization sensing devices
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