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An Exposed-Core Grapefruit Fibers Based Surface Plasmon Resonance Sensor.

Yang X, Lu Y, Wang M, Yao J - Sensors (Basel) (2015)

Bottom Line: The asymmetrically coated fiber can support two separate resonance peaks (x- and y-polarized peaks) with orthogonal polarizations and x-polarized peak, providing a much higher peak loss than y-polarized, also the x-polarized peak has higher wavelength and amplitude sensitivities.A large analyte refractive index (RI) range from 1.33 to 1.42 is calculated to investigate the sensing performance of the sensor, and an extremely high wavelength sensitivity of 13,500 nm/refractive index unit (RIU) is obtained.The silver layer thickness, which may affect the sensing performance, is also discussed.

View Article: PubMed Central - PubMed

Affiliation: College of Precision Instrument and Opto-Electronics Engineering, Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China. yangxianchao@tju.edu.cn.

ABSTRACT
To solve the problem of air hole coating and analyte filling in microstructured optical fiber-based surface plasmon resonance (SPR) sensors, we designed an exposed-core grapefruit fiber (EC-GFs)-based SPR sensor. The exposed section of the EC-GF is coated with a SPR, supporting thin silver film, which can sense the analyte in the external environment. The asymmetrically coated fiber can support two separate resonance peaks (x- and y-polarized peaks) with orthogonal polarizations and x-polarized peak, providing a much higher peak loss than y-polarized, also the x-polarized peak has higher wavelength and amplitude sensitivities. A large analyte refractive index (RI) range from 1.33 to 1.42 is calculated to investigate the sensing performance of the sensor, and an extremely high wavelength sensitivity of 13,500 nm/refractive index unit (RIU) is obtained. The silver layer thickness, which may affect the sensing performance, is also discussed. This work can provide a reference for developing a high sensitivity, real-time, fast-response, and distributed SPR RI sensor.

No MeSH data available.


Dispersion relations and electric field distributions of core modes and the plasmon mode with analyte RI na = 1.42. Insets (a) to (e) are electric field distributions of plasmon mode and core mode at different wavelengths.
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sensors-15-17106-f002: Dispersion relations and electric field distributions of core modes and the plasmon mode with analyte RI na = 1.42. Insets (a) to (e) are electric field distributions of plasmon mode and core mode at different wavelengths.

Mentions: The electromagnetic mode of the sensor is solved by the finite element method (FEM) using COMSOL multiphysics software. Figure 2 shows the dispersion relations and electric field distributions of the core mode and plasmon mode when the RI of the liquid analyte is 1.42. The black solid curve represent the real parts of the effective RI of the x-polarized core mode and black dotted curve represent the real parts of the effective RI of y-polarized core mode. The red curve represents the plasmon mode. The blue solid curve and blue dotted curve represent the imaginary parts of the effective RI of x-polarized core mode and y-polarized core mode, respectively. Inset (a) represent electric field distributions of plasmon mode at λ = 1026 nm; (b) represent y-polarized core mode at λ = 940 nm; (c) represent x-polarized core mode at λ = 940 nm; (d) represent y-polarized core mode at λ = 985 nm (phase matching point); and (e) represent x-polarized core mode at λ = 1026 nm (phase matching point).


An Exposed-Core Grapefruit Fibers Based Surface Plasmon Resonance Sensor.

Yang X, Lu Y, Wang M, Yao J - Sensors (Basel) (2015)

Dispersion relations and electric field distributions of core modes and the plasmon mode with analyte RI na = 1.42. Insets (a) to (e) are electric field distributions of plasmon mode and core mode at different wavelengths.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541925&req=5

sensors-15-17106-f002: Dispersion relations and electric field distributions of core modes and the plasmon mode with analyte RI na = 1.42. Insets (a) to (e) are electric field distributions of plasmon mode and core mode at different wavelengths.
Mentions: The electromagnetic mode of the sensor is solved by the finite element method (FEM) using COMSOL multiphysics software. Figure 2 shows the dispersion relations and electric field distributions of the core mode and plasmon mode when the RI of the liquid analyte is 1.42. The black solid curve represent the real parts of the effective RI of the x-polarized core mode and black dotted curve represent the real parts of the effective RI of y-polarized core mode. The red curve represents the plasmon mode. The blue solid curve and blue dotted curve represent the imaginary parts of the effective RI of x-polarized core mode and y-polarized core mode, respectively. Inset (a) represent electric field distributions of plasmon mode at λ = 1026 nm; (b) represent y-polarized core mode at λ = 940 nm; (c) represent x-polarized core mode at λ = 940 nm; (d) represent y-polarized core mode at λ = 985 nm (phase matching point); and (e) represent x-polarized core mode at λ = 1026 nm (phase matching point).

Bottom Line: The asymmetrically coated fiber can support two separate resonance peaks (x- and y-polarized peaks) with orthogonal polarizations and x-polarized peak, providing a much higher peak loss than y-polarized, also the x-polarized peak has higher wavelength and amplitude sensitivities.A large analyte refractive index (RI) range from 1.33 to 1.42 is calculated to investigate the sensing performance of the sensor, and an extremely high wavelength sensitivity of 13,500 nm/refractive index unit (RIU) is obtained.The silver layer thickness, which may affect the sensing performance, is also discussed.

View Article: PubMed Central - PubMed

Affiliation: College of Precision Instrument and Opto-Electronics Engineering, Key Laboratory of Opto-electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China. yangxianchao@tju.edu.cn.

ABSTRACT
To solve the problem of air hole coating and analyte filling in microstructured optical fiber-based surface plasmon resonance (SPR) sensors, we designed an exposed-core grapefruit fiber (EC-GFs)-based SPR sensor. The exposed section of the EC-GF is coated with a SPR, supporting thin silver film, which can sense the analyte in the external environment. The asymmetrically coated fiber can support two separate resonance peaks (x- and y-polarized peaks) with orthogonal polarizations and x-polarized peak, providing a much higher peak loss than y-polarized, also the x-polarized peak has higher wavelength and amplitude sensitivities. A large analyte refractive index (RI) range from 1.33 to 1.42 is calculated to investigate the sensing performance of the sensor, and an extremely high wavelength sensitivity of 13,500 nm/refractive index unit (RIU) is obtained. The silver layer thickness, which may affect the sensing performance, is also discussed. This work can provide a reference for developing a high sensitivity, real-time, fast-response, and distributed SPR RI sensor.

No MeSH data available.