Theory and modelling of optical waveguide sensors utilising surface plasmon resonance

Čtyroký, Jiřı́; Homola, Jiřı́; Lambeck, Paul; Musa, S.; Hoekstra, H.J.W.M.; Harris, R.D.; Wilkinson, James S.; Usievich, B. A.; Lyndin, N M

doi:10.1016/s0925-4005(98)00328-1

Cited by 94 publications

(78 citation statements)

References 8 publications

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“…[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.…”

Section: Introductionmentioning

confidence: 99%

“…3,[6][7][8][9][10][11][12][13][14][15][16] However, these analyses were made for the sensors in a restricted range of the refractivity (less than 1.45 RI units), and thus a theoretical investigation concerning the response of the gold-deposited optical fiber sensor in a wider range of the refractivity is necessary to understand the mechanism of the response. Morphology observations of gold films deposited on glass by a scanning tunneling microscope (STM) and atomic force microscope (AFM) have been carried out.…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2003

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“…The use of optical waveguides as optical sensors offers nume− rous advantageous features such as small size, ruggedness, potential for realizing various optical functions on a single chip (integration with other optical components), multi−cha− nnel sensing etc. [13]. In one class of commonly used opti− cal waveguide chemical sensors, an analyte (the material to be detected) is placed in the evanescent field of the wave− guide.…”

Section: Introductionmentioning

confidence: 99%

Lossy double negative guiding layer optical sensors

El‐Khozondar

Taya

Shabat

et al. 2011

Opto-Electronics Review

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We proposed a three-layer waveguide as an optical sensor for homogeneous sensing applications. A guiding layer of the proposed structure is considered as lossy left-handed material (LHM) with simultaneously the complex negative electric permittivity ɛ and the complex negative magnetic permeability µ. We also assume a cladding layer to have an intensity-dependent refractive index. Sensitivity of the proposed optical waveguide sensor is derived and its dependence on different parameters of a waveguide is studied.

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“…In previous works, the theoretical investigations of SPR waveguide sensors were limited to two-dimensional (2-D) models [1]- [5]. Note that the 2-D models cannot fully predict the characteristics of practical three-dimensional (3-D) models of the SPR sensors, since the transverse dimensions are not taken into account.…”

Section: Introductionmentioning

confidence: 99%

“…In what follows, we use with and being the effective index of the dielectric TM mode and 5 , respectively ( is the original real reference index and is a phase factor). The structure is discretized with m, m, and m. First, we examine the dependence of the core width on the absorption strength, which cannot be treated in the 2-D models [1]- [5], [11], [12]. The metal strip is wide enough to cover the core region ( m).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Numerical Investigation of an Improved Surface Plasmon Resonance Waveguide Sensor

Shibayama

2010

IEEE Photon. Technol. Lett.

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Abstract-A light-guiding structure is investigated to improve the performance of a surface plasmon resonance waveguide sensor using the three-dimensional beam-propagation method. The absorption strength at the resonance wavelength is examined in terms of the core width. Calculations show that a waveguide with a wide core supporting higher order modes leads to strong absorption comparable to the two-dimensional model. Besides, embedding the core in a substrate is quite effective in obtaining a sharp dip in the wavelength response, i.e., a full-width at half-minimum is reduced from 11 to 5 nm, when the core is embedded by 0.3 m. This contributes to improved measurement precision.Index Terms-Beam-propagation method (BPM), optical waveguide, surface plasmon resonance (SPR) sensor, waveguide-based sensor.

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Theory and modelling of optical waveguide sensors utilising surface plasmon resonance

Cited by 94 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

Lossy double negative guiding layer optical sensors

Three-Dimensional Numerical Investigation of an Improved Surface Plasmon Resonance Waveguide Sensor

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