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Circular hybrid plasmonic waveguide with ultra-long propagation distance
Chang Yeong Jeong1, Myunghwan Kim, Sangin Kim
1Department of Electrical and Computer Engineering, Ajou University, Suwon 443-749, South Korea.
Optics Express
|August 14, 2013
Summary
We introduce a circular hybrid plasmonic waveguide (HPW) with two modes: one highly localized and another with extremely low loss. This novel plasmonic waveguide structure offers a high propagation distance to mode size ratio for advanced optical devices.
Area of Science:
- Photonics and Nanotechnology
- Plasmonics
- Optical Waveguides
Background:
- Plasmonic waveguides are crucial for miniaturizing optical components.
- Achieving both strong light confinement and low propagation loss in plasmonic structures remains a challenge.
Purpose of the Study:
- To propose and analyze a novel circular hybrid plasmonic waveguide (HPW).
- To investigate the unique modes and performance characteristics of the HPW.
- To assess the potential of HPW for integrated photonic applications.
Main Methods:
- Numerical calculations were performed to analyze the waveguide's properties.
- The structure consists of a metal wire coated with low- and high-index dielectric layers.
- Key parameters such as mode area and propagation distance were evaluated.
Main Results:
- The circular HPW supports two distinct modes: a strongly localized mode and an extremely low-loss mode.
- The strongly localized mode has a normalized mode area on the order of 10⁻⁴.
- The low-loss mode achieves propagation distances exceeding 10³ μm with a subwavelength mode area.
Conclusions:
- The HPW demonstrates an ultra-high propagation distance to mode size ratio.
- This novel waveguide is highly beneficial for plasmonic devices like nanolasers, modulators, and switches.
- The HPW design offers a promising solution for advanced integrated optics.
