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.
Cite
@article{arxiv.1101.0040,
title = {Interference of surface plasmon polaritons from a "point" source},
author = {Xifeng Ren and Aiping Liu and Changling Zou and Lulu Wang and Yongjing Cai and Fangwen Sun and Guangcan Guo and Guoping Guo},
journal= {arXiv preprint arXiv:1101.0040},
year = {2015}
}
Comments
11 pages,4 figures