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An improved refractive index sensor based on genetic optimization of plasmon waveguide resonance
Author(s) -
Farshid Bahrami,
Mathieu Maisonneuve,
Michel Meunier,
J. S. Aitchison,
Mo Mojahedi
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.020863
Subject(s) - surface plasmon resonance , refractive index , optics , materials science , polarization (electrochemistry) , plasmon , waveguide , sensitivity (control systems) , surface plasmon , optoelectronics , biosensor , electronic engineering , physics , nanotechnology , chemistry , nanoparticle , engineering
Plasmon waveguide resonance (PWR) sensors are particularly useful for biosensing due to their unique ability to perform sensing with two different polarizations. In this paper we report a comprehensive performance comparison between the surface plasmon resonance (SPR) sensor and the PWR sensor in terms of the sensitivity and the refractive index resolution. Both sensors were optimized using a genetic algorithm to acquire their best performance for bulk sensing applications. The experimental results show that the PWR sensor has a refractive index resolution of 5 × 10(-7) RIU which is 6 times smaller than that of the optimized SPR sensor. The TE polarization in the PWR sensor has a resolution of 1.4 × 10(-6) RIU which is smaller than the SPR sensor. The polarization diversity in the PWR sensor is another advantage which can be used to improve the measurement reliability.

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