Abstract

In this paper, we design a dielectric-to-plasmonic slot waveguide mode converter based on the hybrid silicon-gold taper. The effects of mode matching, the effective index matching, and the metallic absorption loss on the conversion efficiency are studied. Consequently, a metallic taper-funnel coupler with an overall length of 1.7 μm is designed to achieve a very high conversion efficiency of 93.3% at 1550 nm. The configuration limitations for not allowing this mode converter to achieve a 100% conversion efficiency are also investigated. Such a high-efficiency converter can provide practical routes to realize ultracompact integrated circuits.

© 2015 IEEE

Efficient light coupling between dielectric slot waveguide and plasmonic slot waveguide

Ruoxi Yang, Rami A. Wahsheh, Zhaolin Lu, and Mustafa A. G. Abushagur
Opt. Lett. 35(5) 649-651 (2010)

Deep-subwavelength plasmonic mode converter with large size reduction for Si-wire waveguide

Masaaki Ono, Hideaki Taniyama, Hao Xu, Masato Tsunekawa, Eiichi Kuramochi, Kengo Nozaki, and Masaya Notomi
Optica 3(9) 999-1005 (2016)

Experimental and theoretical investigations of an air-slot coupler between dielectric and plasmonic waveguides

Rami A. Wahsheh and Mustafa A. G. Abushagur
Opt. Express 24(8) 8237-8242 (2016)

Plasmon mode transformation in modulated-index metal-dielectric slot waveguides

Ning-Ning Feng and Luca Dal Negro
Opt. Lett. 32(21) 3086-3088 (2007)

Nanofocusing in SOI-based hybrid plasmonic metal slot waveguides

Nicholas A. Güsken, Michael P. Nielsen, Ngoc B. Nguyen, Stefan A. Maier, and Rupert. F. Oulton
Opt. Express 26(23) 30634-30643 (2018)