Sensing properties of asymmetric double-layer-covered tapered fibers

Bueno, F. Javier; Esteban, Óscar; Díaz-Herrera, Natalia; Navarrete, María-Cruz; González-Cano, Agustı́n

doi:10.1364/ao.43.001615

Cited by 36 publications

(43 citation statements)

References 12 publications

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“…The RI of the mixture depends on the ethylene glycol concentration according to the following empirical law 13 :…”

Section: Resultsmentioning

confidence: 99%

“…10,13 The first one is decreasing the fiber diameter so that we can reach the evanescent field of the mode propagated by the unperturbed fiber. We follow the procedure developed by Kenny et al, 12 the so-called traveling burner.…”

Section: Experimental Arrangementmentioning

confidence: 99%

“…We have chosen a first layer of Al 8 nm thick and a second layer of TiO 2 60 nm thick. The Al shows better adherence than Au to SiO 2 fibers, and it is best suited for SPR at wavelengths in the 600-1000 nm range, while the TiO 2 layer is used to tune the SPR response to the refractive index range of interest, 13,14 which relies on the interval 1.32-1.40 of aqueous solutions at wavelengths in the visiblenear-infrared spectral range.…”

Section: Experimental Arrangementmentioning

confidence: 99%

“…10 With this method, it is possible to obtain uniform-waist tapered (UWT) fibers with a controlled length and a waist diameter in a highly reproducible way. Furthermore, SPR sensors with UWT fibers have shown a high sensitivity and dynamic range 10,[13][14][15] and could be the best option when the sample volume is not a critical parameter.…”

Section: Introductionmentioning

confidence: 99%

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Surface plasmon resonance sensors based on uniform-waist tapered fibers in a reflective configuration

et al. 2006

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We present a configuration for surface plasmon resonance sensors based on uniform-waist tapered optical fibers and reflective elements. Once the fiber is tapered fulfilling the adiabatic criterion, a multilayer including a metallic medium is asymmetrically deposited on the uniform waist of the fiber. This feature provides the resonant excitation of multiple surface plasma waves. In addition, a mirror is produced at the fiber tip by a chemical Tollens reaction. In this way, the sensor operates in a reflective mode, more convenient for dip probes. When these sensors are spectrally interrogated, a high sensitivity of 10 Ϫ4 refractive index units per nanometer is attained. These devices can be advantageously used for any kind of chemical sensing and biosensing.

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“…The RI of the mixture depends on the ethylene glycol concentration according to the following empirical law 13 :…”

Section: Resultsmentioning

confidence: 99%

Section: Experimental Arrangementmentioning

confidence: 99%

Section: Experimental Arrangementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface plasmon resonance sensors based on uniform-waist tapered fibers in a reflective configuration

et al. 2006

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“…The resonance wavelength or resonance refractive index of SPR sensors can be tuned to some extent by using buffer layers between the dielectric waveguide layer and the gold layer or by choosing the appropriate metal [2,4,5,13]. The fact that our device is based on interference rather than phase-matching allows one to tune the response of the device much more easily.…”

Section: Design Principlesmentioning

confidence: 99%

Surface plasmon interferometer in silicon-on-insulator: novel concept for an integrated biosensor

Debackere¹,

Scheerlinck²,

Bienstman³

et al. 2006

Opt. Express

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Abstract:We propose a novel configuration for a highly integrated and highly sensitive optical biosensor. The basic element of the sensor is a surface plasmon interferometer consisting of a thin layer of gold embedded in a silicon membrane. We investigate the performance of the sensor by simulation using eigenmode expansion. We calculate that refractive index changes in the order of 10 −6 RIU should be easily detectable for a component of length 10 µm. Moreover, we illustrate that the operation wavelength of the sensor can be easily tuned to a desired wavelength for a wide range of environmental refractive indices, making our device suitable for chemo-and biosensing.

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