Wavelength controllable device for simultaneous generation of surface plasmon polariton Bessel-like beams and bottle beams

Abstract

Realizing multiple beam shaping functions in a single plasmonic device is the key to realizing photonic integration. Surface Plasmon Polariton (SPP) Bessel-like Beams and Bottle Beams have potential applications in nanophotonics, especially in near-field optical trapping, micro-manipulation, and on-chip interconnect circuits. Thus, it is very interesting to find new approaches for simultaneous generation of surface plasmon polariton Bessel-like beams and bottle beams in a single photonic device. The wavelength-manipulated Bessel SPP beam and Bottle beam emitters devices are composed of four and five compact coupling elements with a specific spatial distribution, respectively. Besides, as the wavelength of the incident light is changed, the generated Bessel-like SPP beam and SPP Bottle beam can be directionally excited on one side of the transmitter and the launching direction can be dynamically selected. The design scheme of the proposed device provides a new means for constructing plasmonic devices with multiple beam shaping functionalities.