Interference of surface plasmon polaritons from a "point" source

Abstract

The interference patterns of the surface plasmon polaritons(SPPs) on the metal surface from a "point" source are observed. These interference patterns come from the forward SPPs and the reflected one from the obstacles, such as straightedge,corner, and ring groove structure. Innovation to the previous works, a "point" SPPs source with diameter of 100 nm is generated at the freely chosen positions on Au/air interface using near field excitation method. Such a "point" source provides good enough coherence to generate obvious interference phenomenon. The constructive and destructive interference patterns of the SPPs agree well with the numerical caculation. This "point" SPPs source may be useful in the investigation of plasmonics for its high coherence, deterministic position and minimum requirement for the initial light source.

11 pages,4 figures

References in corpus (4)

• Efficient unidirectional nanoslit couplers for surface plasmons
• Energy-time entanglement preservation in plasmon-assisted light transmission
• Plasmon assisted transmission of high dimensional orbital angular momentum entangled state
• Interference of surface plasmon polaritions controlled by the phase of incident light

Cited by in corpus (3)

• Phase Resolved Surface Plasmon Interferometry of Graphene
• Observation of surface plasmon polaritons in 2D electron gas of surface electron accumulation in InN nanostructures
• A fully automated dual-tip scanning near-field optical microscope for localized optical excitation and detection in the visible and near-infrared