title: Reflection based Extraordinary Optical Transmission Fiber Optic Probe for Refractive Index Sensing.
abstract: Fiber optic probes for chemical sensing based on the extraordinary optical transmission (EOT) phenomenon are designed and fabricated by perforating subwavelength hole arrays on the gold film coated optical fiber endface. The device exhibits a red shift in response to the surrounding refractive index increases with high sensitivity, enabling a reflection-based refractive index sensor with a compact and simple configuration. By choosing the period of hole arrays, the sensor can be designed to operate in the near infrared telecommunication wavelength range, where the abundant source and detectors are available for easy instrumentation. The new sensor probe is demonstrated for refractive index measurement using refractive index matching fluids. The sensitivity reaches 573 nm/RIU in the 1.333~1.430 refractive index range.
authors.affiliation: Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina, 29634, USA.
authors.forename: Xinwei
authors.initials: X
authors.lastname: Lan
authors.affiliation: Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina, 29634, USA.
authors.forename: Baokai
authors.initials: B
authors.lastname: Cheng
authors.affiliation: Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri, 65409, USA.
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina, 29634, USA.
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina, 29634, USA.
authors.forename: Hanzheng
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri, 65409, USA.
authors.forename: Yinfa
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri, 65409, USA.
authors.forename: Honglan
authors.initials: H
authors.lastname: Shi
authors.affiliation: Department of Electrical and Computer Engineering, Clemson University, Clemson, South Carolina, 29634, USA.
authors.forename: Hai
authors.initials: H
authors.lastname: Xiao
keywords: extraordinary optical transmission; optical fiber sensor; refractive index sensor; surface plasmon resonance