Open AccessOptical bistability and nonlinearity of coherently coupled exciton-plasmon systems
Author(s) -
Jianbo Li,
Nam-Chol Kim,
Mu-Tian Cheng,
Li Zhou,
Hao Zhang,
QuQuan Wang
Publication year - 2012
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.20.001856
Subject(s) - bistability , optical bistability , exciton , plasmon , quantum dot , population , physics , nonlinear optics , optoelectronics , optics , materials science , condensed matter physics , laser , demography , sociology
We theoretically investigated optical third-order nonlinearity of a coherently coupled exciton-plasmon hybrid system under a strong control field with a weak probe field. The analytic formulas of exciton population and effective third-order optical susceptibility of the hybrid of a metal nanoparticle (MNP) and a semiconductor quantum dot (SQD) were deduced. The bistable exciton population and the induced bistable nonlinear absorption and refraction response were revealed. The bistability region can be tuned by adjusting the size of metal nanoparticle, interparticle distance and intensity of control field. Our results have perspective applications in optical information processing based on resonant coupling of exciton-plasmon.