Directional control of surface plasmon polariton waves propagating through an asymmetric Bragg resonator

Abstract

Articles you may be interested inPropagation and enhancement of ultraviolet radiation in metal-dielectric nanocables assisted by surface plasmon polaritons Appl. Phys. Lett. 102, 171601 (2013); 10.1063/1.4803463 Efficient unidirectional generation of surface plasmon polaritons with asymmetric single-nanoslit Appl. Phys. Lett. 97, 041113 (2010); 10.1063/1.3472251 Low-frequency surface plasmon polaritons propagating along a metal film with periodic cut-through slits in symmetric or asymmetric environments J. Appl. Phys. 105, 013704 (2009); 10.1063/1.3055395 Tailoring surface plasmon polariton propagation via specific symmetry properties of nanostructures Appl. Phys. Lett. 91, 203109 (2007); 10.1063/1.2806224 Bragg scattering of surface plasmon polaritons on extraordinary transmission through silver periodic perforated hole arrays

Mapping the near-field propagation of surface plasmons on terahertz metasurfaces

“…10 Recently, asymmetric SPPs excitation has drawn much research interest. 11,12 In the optical and microwave regimes, it has been reported that passive and tunable directional SPPs can be excited by properly engineering the surface phase profile or via interference with subwavelength structures. 10,11,[13][14][15][16] Nevertheless, similar studies or devices are seldom carried out or reported at terahertz frequencies.…”

“…11,12 In the optical and microwave regimes, it has been reported that passive and tunable directional SPPs can be excited by properly engineering the surface phase profile or via interference with subwavelength structures. 10,11,[13][14][15][16] Nevertheless, similar studies or devices are seldom carried out or reported at terahertz frequencies. Developing functional terahertz plasmonic devices will be of considerable interest in reducing the size of the current terahertz systems, particularly in developing on-chip terahertz systems which could be orders of magnitude smaller in size than the free-space counterparts, and at the same time it will help bridging the gap to real applications of the terahertz radiation.…”

Helicity dependent directional surface plasmon polariton excitation using a metasurface with interfacial phase discontinuity

“…These include using oblique incidence onto slits, 22 or utilizing delicate control of phase interaction through blazed gratings, Bragg reflection and coherent processes. 23,24 The implementation of these techniques requires either complex optical setups to modulate the retardation between two light pulses, or mechanical adjustments. Here we propose and realize a novel scheme of tunable unidirectional excitation of surface plasmon polaritons whose propagating direction depends on the helicity of incident light, based on a polarization-dependent phase discontinuity resulting from carefully designed metasurfaces.…”

Plasmonic splitter based on the metal-insulator-metal waveguide with periodic grooves

“…It was found that the output gratings of the asymmetrical structure can support surface waves at different frequencies. More recently, it was reported that the direction of SPPs propagation can be selected by controlling the phase of optical field composition in the asymmetric Bragg resonator [15]. In the output surfaces of the above-mentioned structures, the SPPs propagate along the metal/dielectric interface, and the field skin depth remains approximately constant with the increasing of wavelength in the metal but increases in the dielectric for visible and near-infrared frequencies.…”