Monochromatic excitation of surface plasmon resonance in an optical-fibre refractive-index sensor

Ronot-Trioli, C.; Trouillet, Alain; Veillas, Colette; Gagnaire, H.

doi:10.1016/s0924-4247(97)80020-9

Cited by 65 publications

(22 citation statements)

References 8 publications

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“…5 The shift of the minimum toward a lower refractivity with an increase in the film thickness has been reported in the response curves of a gold-deposited optical fiber sensor with the film deposited on the polished core. 8,10,11 A shift of the minimum in the refractivity with the film thickness is a general character of these gold-deposited optical fiber sensors.…”

Section: Response Curves Of the Sensors With Various Film Thicknessesmentioning

confidence: 84%

“…[3][4][5][6][7][8][9][10][11][12][13][14][15][16] A typical type of the optical fiber sensor based on SPR has a thin (several tens of nanometers) deposited silver or gold film around an exposed core of a multi-mode optical fiber, and the core is used instead of a coupling prism of the SPR sensor system. [3][4][5][6][7] These systems are constructed by modifying a traditional SPR sensor system, and scan the wavelength 3 or change the angle of incident light. [4][5][6][7] Another type of the sensor based on SPR in a thin deposited gold film on the core of a side polished single-mode optical fiber implanted in a silica block has been developed.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6][7] These systems are constructed by modifying a traditional SPR sensor system, and scan the wavelength 3 or change the angle of incident light. [4][5][6][7] Another type of the sensor based on SPR in a thin deposited gold film on the core of a side polished single-mode optical fiber implanted in a silica block has been developed. [8][9][10][11] Though this type of sensor has high resolution, probably because of an optimum bend of the singlemode optical fiber, and no need to change the incident angle, fabrication of the sensing element and the optics of the system are complicated.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Analysis of Gold-deposited Optical Fiber Sensor and Characterization of the Gold Film

2003

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Gold-deposited optical fiber sensors with film thicknesses from 30 to 60 nm were prepared, and the responses to a wide range of a refractivity (1.33 -1.54 refractive index (RI) units) were investigated both experimentally and theoretically. The response curve of the sensor has two minima in the refractivity range from 1.33 to 1.44 and at 1.462 RI units. The former minimum is due to surface plasmon resonance (SPR) in the thin gold film, and shifts to a lower refractivity as the film becomes thicker. The response curves of the sensors with film thicknesses of 45 and 60 nm agreed well with those calculated from SPR theoretical equations. Morphology observations of the surfaces of deposited gold films on glass by atomic force microscopy (AFM) and a variation in resistance of the films with various thicknesses show the structure of the gold films. We concluded that the thin deposited gold films have many defects, and that the core of the golddeposited optical fiber leaks light through the defects to the sample solution with the same refractivity (1.462 RI units) as that of the core.

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Section: Response Curves Of the Sensors With Various Film Thicknessesmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical Analysis of Gold-deposited Optical Fiber Sensor and Characterization of the Gold Film

2003

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“…The systems have a sensing element of a deposited metal film on the core of an optical fiber and must scan the wavelength 3,4 or change the angle of incident light. [5][6][7][8][9][10][11][12][13][14][15] Another type of the sensor based on SPR in a thin deposited metal film on the core of an optical fiber implanted in a silica block and polished has been reported. [16][17][18][19][20][21][22][23] A gold island SPR sensor has also been investigated.…”

Section: Introductionmentioning

confidence: 99%

Simplification and Evaluation of a Gold-deposited SPR Optical Fiber Sensor

Mitsushio

Higo

2004

ANAL. SCI.

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New sensor systems using surface plasmon resonance (SPR) have been developed for measuring the refractive index (RI) of an analyte. 1,2 The systems use an optical phenomenon in which incident light excites a charge-density wave at the interface between a metal and a dielectric. 1,2 An SPR sensor allows the realization of quick determination of the RI of a sample with high accuracy. However, the usual SPR sensor systems utilize bulk optical configurations that are limited by the use of a coupling prism. Furthermore, since the SPR system requires a spectrometer or a rotation stage, the resulting systems are relatively large and expensive, are inapplicable for remote sensing applications. 3 Optical fiber sensors based on the SPR phenomenon have been developed. These systems replace a coupling prism with an optical fiber, and the SPR phenomenon is applicable to analyses of liquid or gas samples. The systems have a sensing element of a deposited metal film on the core of an optical fiber and must scan the wavelength 3,4 or change the angle of incident light. [5][6][7][8][9][10][11][12][13][14][15] Another type of the sensor based on SPR in a thin deposited metal film on the core of an optical fiber implanted in a silica block and polished has been reported. [16][17][18][19][20][21][22][23] A gold island SPR sensor has also been investigated. [24][25][26][27][28][29] Most theoretical analyses for the optical fiber sensors using SPR are based on the traditional Kretschmann configuration and the response curves have been calculated. 3,6,12,14,[16][17][18][19][20][21][22][23][30][31][32][33][34] However, these analyses are made for the sensors in a restricted range of the refractivity (less than 1.45 RI units). Thus, a theoretical investigation of the response of the gold-deposited optical fiber sensor over a wider range of refractivity is necessary to understand the mechanism of the response.An optical fiber sensor system based on SPR without scanning the wavelength or changing the angle of incident light is desired for remote sensing, continuous analysis, and in situ monitoring using a small and inexpensive sensing element. We have already developed a small and simple gold-deposited optical fiber sensor system without scanning the wavelength or changing the angle of incident light. [35][36][37][38][39][40] The sensing element has a thin (30 -60 nm) gold film deposited all around the bare core of an optical fiber and a sample solution flows around it. When light with an intensity distribution is introduced into the optical fiber of the sensor with a focusing lens, the SPR occurs at the interface between the gold film and the sample solution. A part of the incident light disappears by the SPR and the intensity of the transmitted light varies depending on the refractivity of the sample solution. [35][36][37][38][39][40] We have performed the analyses of various alcohol solutions [35][36][37][38][39][40] and some esters in ethanol 36 and have demonstrated the usefulness of this sensor system. Theoretical analyses for the ...

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“…For example, authors use Surface Plasmon Resonance (SPR) on optical fibre [1][2][3][4] as a technique for gas and bio-chemical detection. Recently, an increase interest in the application of porous layers prepared by the sol-gel method for the development of fibre-optic chemical sensors have been observed.…”

Section: Introductionmentioning

confidence: 99%

Chemical detection in liquid media with a refractometric sensor based on a multimode optical fibre

Cherif¹,

Hleli²,

Abdelghani³

et al. 2002

Sensors

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Abstract:In this paper the physical basis for the design of an optical fibre sensor suited for aqueous medium and gas phase based on the excitation of an evanescent wave at the core/cladding interface is developed. The detection based on the refractive index changes (between 1.41 and 1.45) of the infinite dielectric medium which can be an electrolyte or a sol-gel polymer deposited on the uncladed part of the fibre. Refractive indices of absorbent and volatile compounds such as fuel and unleaded gas were determined. Using a xerogel sensing layer as optical cladding, toluene detection in water was performed. The observed sensitivity is linear and the detection limit is 1% (in volume) toluene in water.

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Monochromatic excitation of surface plasmon resonance in an optical-fibre refractive-index sensor

Cited by 65 publications

References 8 publications

Theoretical Analysis of Gold-deposited Optical Fiber Sensor and Characterization of the Gold Film

Theoretical Analysis of Gold-deposited Optical Fiber Sensor and Characterization of the Gold Film

Simplification and Evaluation of a Gold-deposited SPR Optical Fiber Sensor

Chemical detection in liquid media with a refractometric sensor based on a multimode optical fibre

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