Open AccessSimultaneous directional emissions of multiple quantum emitters with cross plasmonic antenna
Author(s) -
Jingjing Yang,
S M Wang,
Qingqing Cheng,
T Li,
Xiaopeng Hu,
Shining Zhu
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.23.015098
Subject(s) - plasmon , physics , optics , antenna (radio) , directivity , wavelength , scattering , quantum efficiency , optoelectronics , quantum , telecommunications , quantum mechanics , computer science
We introduce a cross plasmonic antenna (CPA) for the system of multiple quantum emitters (QEs) with different emission wavelengths, where the excitation light scattering and emission fluorescence of different QEs are spatially separated in four different directions. By considering the CPA as oscillating dipoles, this phenomenon is attributed to the phase differences between them. The enhancement for QEs are very strong in correponding directions. In addition, the fluorescence is strongly polarized. By adding a silver plate as substrate, the directivity can be further tuned in the whole upper half space. Our result shows that the CPA is promising for realization of an efficient, directional and strongly polarized nano-scale light source, which will have potential application in Nano-Optics.