Efficient optical coupling into ultra-compact plasmonic slot waveguides using dipole nanoantennas

Qian Gao; Fanghui Ren; Alan X. Wang

doi:10.1117/12.2217548

3 March 2016 Efficient optical coupling into ultra-compact plasmonic slot waveguides using dipole nanoantennas

Qian Gao, Fanghui Ren, Alan X. Wang

Proceedings Volume 9751, Smart Photonic and Optoelectronic Integrated Circuits XVIII; 975107 (2016) https://doi.org/10.1117/12.2217548
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

Nanoantenna is used for coupling free space radiation to subwavelength plasmonic waveguide. We provide a theoretical design of ultra-compact dipole nanoantennas --- Yagi-Uda antenna with a reflector in telecom range and experimentally demonstrate efficient optical coupling between lensed fiber and plasmonic slot waveguide by utilizing our designed nanoantenna. We also prove that the couple-in efficiency of 8% from the lensed fiber does not equal to the couple-out efficiency of 50% from the plasmonic slot waveguide using the same nanoantenna design, which is different than many published and experimental results. We also study the relationship between couple in efficiency and the incident light spot size, which is experimentally characterized.

Citation Download Citation

Qian Gao, Fanghui Ren, and Alan X. Wang "Efficient optical coupling into ultra-compact plasmonic slot waveguides using dipole nanoantennas", Proc. SPIE 9751, Smart Photonic and Optoelectronic Integrated Circuits XVIII, 975107 (3 March 2016); https://doi.org/10.1117/12.2217548

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