Design of long-range hybrid plasmonic waveguides

Rajib Ratan Ghosh; Arun Thomas; Priyanka Bhardwaj; Senthil Subramanian; Kaleem Ahmed; Anuj Dhawan

doi:10.1117/12.2511025

27 February 2019 Design of long-range hybrid plasmonic waveguides

Rajib Ratan Ghosh, Arun Thomas, Priyanka Bhardwaj, Senthil Subramanian, Kaleem Ahmed, Anuj Dhawan

Proceedings Volume 10914, Optical Components and Materials XVI; 109141Z (2019) https://doi.org/10.1117/12.2511025
Event: SPIE OPTO, 2019, San Francisco, California, United States

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.

Citation Download Citation

Rajib Ratan Ghosh, Arun Thomas, Priyanka Bhardwaj, Senthil Subramanian, Kaleem Ahmed, and Anuj Dhawan "Design of long-range hybrid plasmonic waveguides ", Proc. SPIE 10914, Optical Components and Materials XVI, 109141Z (27 February 2019); https://doi.org/10.1117/12.2511025

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