Access to this article is restricted until 12 months after publication by request of the publisher.. Restriction lift date: 2019-06-18
Surface plasmon propagation enhancement via bowtie antenna incorporation in Au-mica block waveguides
Pita, Isabel A.
Ryan, Kevin M.
Optical Society of America
The optimum geometry for waveguide propagation was determined by comparing bowtie and semicircle antenna cuts to a standard plain waveguide with a 635 nm laser. The results of both experimental data and COMSOL simulations proved that the bowtie antenna increased waveguide output in comparison to the plain waveguide with the semicircle pattern showing no enhancement. It was also determined that the propagation was highest when the polarization direction of the laser was perpendicular to the direction of the waveguide for all patterns, while polarization along the propagation direction led to little or no output in all antenna and plain waveguide cases. The waveguide output of the bowtie antenna and plain structures was then measured using a tunable laser for wavelengths from 570 nm to 958 nm under both parallel and perpendicular polarization conditions. The results indicated that the bowtie antenna performed better over the entire range with an average increase factor of 2.12±0.40 over the plain waveguide pattern when perpendicularly polarized to the waveguide direction, and 1.10±0.48 when parallel. The measured values indicate that the structure could have applications in broadband devices.
Microstructure fabrication , Optoelectronics , Waveguides , Surface plasmons , Electric fields , Laser light , Light wavelength , Tunable lasers , Wave plates
Pita, I. A., Kumbham, M., Schmidt, M., Gleeson, M., Ryan, K. M., Silien, C. and Liu, N.(2018) 'Surface plasmon propagation enhancement via bowtie antenna incorporation in Au-mica block waveguides', Applied Optics, 57(22), pp. 50-56. doi:10.1364/AO.57.000E50
© 2018, Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.