Propagation of exciton-wave through a Mach-Zehnder interferometer type nanocrystal chain array

Abstract

We present a detailed analysis of the exciton transport through a Mach-Zehnder interferometer type nanocrystal ring array. The transmittance of the exciton-wave throughout the interferometer ring is shown to have a strong dependence on the Coulomb coupling between nanocrystals, sites energies, and the number of nanocrystals in the part of interferometer arms. We discuss the transmission characteristics of the exciton-wave depending on the constitution of the Mach-Zehnder interferometer ring. The analysis shows that the system can be exploited as a nano-sensor for probing nano-optical environment or a nano-optical switching device in near field optical circuits or waveguides. (C) 2012 Elsevier B.V. All rights reserved.