Nanoscale bowtie aperture as high efficiency light coupler with plasmonic waveguide

Edward C. Kinzel; Xianfan Xu

doi:10.1117/12.829348

2 September 2009 Nanoscale bowtie aperture as high efficiency light coupler with plasmonic waveguide

Edward C. Kinzel, Xianfan Xu

Proceedings Volume 7394, Plasmonics: Metallic Nanostructures and Their Optical Properties VII; 73942Y (2009) https://doi.org/10.1117/12.829348
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

Efficiently coupling far field light into a nano structure is a challenge. This limits the utility of many of the nanophotonics devices that have been developed recently, such as waveguides carrying surface plasmon polariton modes with subwavelength confinement and long propagation length. End fire coupling is an option but requires careful alignment and may not be suitable for exciting densely packed arrays of waveguides. This paper investigates the use of a nanoscale bowtie aperture as an antenna for directly coupling far field light into a nanoscale plasmonic waveguide. The paper shows that when the aperture is designed to be resonant the coupling coefficient can be as high as 600% relevant to the energy incident on the open area of the aperture.

Citation Download Citation

Edward C. Kinzel and Xianfan Xu "Nanoscale bowtie aperture as high efficiency light coupler with plasmonic waveguide", Proc. SPIE 7394, Plasmonics: Metallic Nanostructures and Their Optical Properties VII, 73942Y (2 September 2009); https://doi.org/10.1117/12.829348

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