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Updated: Sep 11, 2025

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Coherent control of anisotropic SPPs in a symmetric double-layer metal/uniaxial dielectric structure
Jabir Khan1, Amjad Sohail2, Amsyar Rahim3
1Department of Physics, Abbottabad University of Science and Technology, Havellian, 22500, Pakistan.
Abstract:
We investigate the coherent control of anisotropic surface plasmon polaritons (SPPs) in a symmetric double-layer metal/uniaxial dielectric structure. The directional anisotropy introduced by the uniaxial dielectric enables tunable SPP dispersion, absorption, and propagation characteristics through an external control field. We analyze reflection and transmission spectra, dispersion relations, propagation lengths, and the scattering matrix eigenmodes. Our results reveal strong modulation of SPP wavelength and enhanced propagation length with varying control field strength and metal layer composition. Remarkably, we observe coherent perfect absorption for both symmetric and anti-symmetric modes, an effect not commonly realized in such layered anisotropic systems. This work introduces a novel platform for actively tunable nanoplasmonic devices, with potential applications in waveguiding, sensing, and plasmonic circuitry.
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