Pita_2018_Surface.pdf (2.58 MB)
Surface plasmon propagation enhancement via bowtie antenna incorporation in au-mica block waveguides
journal contribution
posted on 2022-10-03, 11:16 authored by Isabel A. Pita, Mahendar Kumbham, Michael Schmidt, Matthew Gleeson, KEVIN M. RYANKEVIN M. RYAN, Christophe SilienChristophe Silien, NING LIUNING LIUThe 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.
Funding
Study on Aerodynamic Characteristics Control of Slender Body Using Active Flow Control Technique
Japan Society for the Promotion of Science
Find out more...History
Publication
Applied Optics;57 (22), pp. E50-E56Publisher
Optical Society of AmericaNote
peer-reviewedOther Funding information
SFI, ERCRights
This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: https://doi.org/10.1364/AO.57.000E50. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.Language
EnglishAlso affiliated with
- Bernal Institute
External identifier
Department or School
- Physics
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