Managing optical bistability and multistability by embedding quantum dot nanostructures in a photonic crystal
Department of Physics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
* e-mail: S.Hosein.Asadpour@gmail.com
Accepted: 4 October 2016
Published online: 21 November 2016
The optical bistability and multistability properties are studied in a defect slab doped with acceptor and donor quantum dots embedded in a nonlinear photonic crystal. It is shown that the intensity threshold of optical bistability can be controlled via the corresponding controllable parameters, such as Rabi frequency of coupling field and the thickness of the slab. It is found that the switching from optical bistability to multistability can be obtained by enhancing the Rabi frequency of the coupling field. Moreover, it is observed that the dipole-dipole interaction between acceptor and donor quantum dots can lead to modifying the behaviors of optical bistability and multistability. Also, it is demonstrated that the optical thickness of the slab can be used as a potential parameter to control the intensity threshold of optical bistability and multistability. It is found that, by decreasing or increasing the optical thickness parameter, the threshold of optical bistability or multistability can be decreased or increased, correspondingly. We hope that our proposed model can be used for developing the future all-optical systems based on photonic materials doped with nanoparticles.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2016