Low Loss Hybrid Dielectric-Metal-Dielectric Waveguides for Sub-Micron Mode Confinement and Efficient Directional Coupling

Abstract:

In this paper, we present the design of a novel hybrid dielectric-metal-dielectric waveguide, which consists of a metal stripe sandwiched between low-high dielectric layers. Its modal characteristics are investigated using the finite element method at the telecom wavelength. Simulations show that the dielectric contrast near the metal stripe results in a strongly confined hybrid plasmonic mode with sub-micron mode size and low propagation loss. The effects of geometrical parameters are analyzed systematically and the properties of directional couplers based on such hybrid waveguide are also investigated. The proposed structure could be useful candidates for various integrated optical devices and enable many applications such as electro-optic modulation, switching, sensing and more.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 839-842
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.839
• Online since: February 2012
• Authors: Mo Yang, Jin Cheng Song
• Keywords: Confinement, Low Loss, Waveguides and Directional Couplers

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