Enhanced Birefringence Modes of surface plasmon polariton induced by a hybrid chiral QD medium

Abstract

In this study, we propose a detailed theoretical approach to explore the birefringent surface plasmon polariton (SPP) modes at the interface of a hybrid nanostructure. This nanostructure comprises a gold (Au) metal layer combined with a chiral quantum dot (CQD) medium. The characteristics of SPP in this hybrid configuration are derived using detailed analytical methods based on Maxwell’s equations, with appropriate boundary conditions applied to ensure accuracy. Additionally, the dynamics of the CQD system are analyzed using the density matrix formalism, which enables a detailed description of the quantum interactions within the medium. Our analysis demonstrates that the birefringent SPP modes, discernible in both absorption and dispersion spectra, can be effectively controlled by manipulating key parameters such as inter-dot tunneling strength and spontaneous emission rates. This tunability also extends to the propagation length and phase shift of the birefringent SPP beams, which can be modulated under the same set of conditions. The ability to control these birefringent SPP modes offers significant potential for the development of advanced imaging systems and the design of compact, efficient nanophotonic devices. By utilizing the interaction between the CQD and the metallic interface, our study not only enhances the understanding of SPP behavior in hybrid nanostructures but also opens up new possibilities for the application of photonic technologies at the nanoscale. The engineering of these birefringent SPP modes could lead to substantial advancements in high-resolution imaging, the fabrication of novel photonic circuits, and other areas critical to the progression of nanophotonics.