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Design of long-range hybrid plasmonic waveguides
Author(s): Rajib Ratan Ghosh; Arun Thomas; Priyanka Bhardwaj; Senthil Subramanian; Kaleem Ahmed; Anuj Dhawan
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Paper Abstract

We propose and design long-range hybrid plasmonic waveguides (HPW) consisting of a combination of plasmonic thin film and nano-scale structures of a high refractive index material (such as silicon), with a low refractive index material (such as silica) surrounding the nano-scale structures and the plasmonic thin film. The effective refractive index and the corresponding propagation length obtained for these plasmonic waveguides, obtained using a full-vector finite difference eigen mode (FDE) solver, demonstrates the viability of these hybrid plasmonic waveguides in applications that demands long propagation range with reasonable field confinement. These waveguides not only have high propagation lengths ⎯ even greater than 1 mm for certain geometrical parameters of the plasmonic waveguides ⎯ but can also have tight mode confinement (low effective mode area). Moreover, the proposed hybrid plasmonic waveguides can also be easily fabricated using the conventional nanolithography processes. Moreover, we study the effect of the variation of different waveguide parameters on the propagation length and effective mode area.

Paper Details

Date Published: 27 February 2019
PDF: 7 pages
Proc. SPIE 10914, Optical Components and Materials XVI, 109141Z (27 February 2019); doi: 10.1117/12.2511025
Show Author Affiliations
Rajib Ratan Ghosh, Indian Institute of Technology Delhi (India)
Arun Thomas, Indian Institute of Technology Delhi (India)
Priyanka Bhardwaj, Indian Institute of Technology Delhi (India)
Senthil Subramanian, Indian Institute of Technology Delhi (India)
Kaleem Ahmed, Indian Institute of Technology Delhi (India)
Anuj Dhawan, Indian Institute of Technology Delhi (India)

Published in SPIE Proceedings Vol. 10914:
Optical Components and Materials XVI
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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