Open AccessExperimental solution for scattered imaging of the interference of plasmonic and photonic mode waves launched by metal nano-slits
Author(s) -
Xing Li,
Yaru Gao,
Shu-Na Jiang,
Li Ma,
Chunxiang Liu,
Chuanfu Cheng
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.003507
Subject(s) - optics , physics , interference (communication) , diffraction , scattering , plasmon , phase (matter) , reflection (computer programming) , interferometry , channel (broadcasting) , quantum mechanics , computer science , electrical engineering , programming language , engineering
Using an L-shaped metal nanoslit to generate waves of the pure photonic and plasmonic modes simultaneously, we perform an experimental solution for the scattered imaging of the interference of the two waves. From the fringe data of interference, the amplitudes and the wavevector components of the two waves are obtained. The initial phases of the two waves are obtained from the phase map reconstructed with the interference of the scattered image and the reference wave in the interferometer. The difference in the wavevector components gives rise to an additional phase delay. We introduce the scattering theory under Kirchhoff's approximation to metal slit regime and explain the wavevector difference reasonably. The solution of the quantities is a comprehensive reflection of excitation, scattering and interference of the two waves. By decomposing the polarized incident field with respect to the slit element, the scattered image produced by slit of arbitrary shape can be solved with the nanoscale Huygens-Fresnel principle. This is demonstrated by the experimental intensity pattern and phase map produced by a ring-slit and its consistency with the calculated results.