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Title

Optical bistability of a plexcitonic system consisting of a quantum dotnear a metallic nanorod

Pages

 Start Page 183 | End Page 189

Abstract

 Optical response of a complex nanodimer comprising a semiconductor quantum dot via Coulomb interaction to a metalnanorod is analyzed theoretically. Optical bistability (OB) behavior of a coherently coupled exciton-plasmon (plexcitonic)hybrid system under a laser field is investigated. The bistable exciton population in a hybrid metal– semiconductornanodimer response is shown, and it could be pointed out that OB behavior is strongly influenced by various parameterssuch as size of metal nanoparticle, interparticle distance as well as intensity of probe laser field. We show that OB can beobserved for a plexcitonic system and depends strongly on the type of the metals which are good candidates for plasmonicapplications. The numerical calculations show the gold nanorod exhibits significant optical bistability. The result promisesvarious applications in the field of all-optical information processing at the nanoscale, the most basic of them being theoptical switching, optical memory, optical transistor and optical logic.

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