Miniaturized Long-Period Fiber Grating Assisted Surface Plasmon Resonance Sensor

Schuster, Tobias; Herschel, Reinhold; Neumann, Niels; Schäffer, C.

doi:10.1109/jlt.2011.2166756

Cited by 83 publications

(50 citation statements)

References 22 publications

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“…This condition can be satisfied using a metallic thin layer (40-60 nm). Recently, OFGs have been used as a valid option to excite SPR due to its core-cladding efficient coupling mechanism and physical robustness, especially in the case of TFBGs [24] and LPG [25].…”

Section: Fundamentalsmentioning

confidence: 99%

Biosensing with optical fiber gratings

et al. 2017

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Optical fiber gratings (OFGs), especially longperiod gratings (LPGs) and etched or tilted fiber Bragg gratings (FBGs), are playing an increasing role in the chemical and biochemical sensing based on the measurement of a surface refractive index (RI) change through a label-free configuration. In these devices, the electric field evanescent wave at the fiber/surrounding medium interface changes its optical properties (i.e. intensity and wavelength) as a result of the RI variation due to the interaction between a biological recognition layer deposited over the fiber and the analyte under investigation. The use of OFG-based technology platforms takes the advantages of optical fiber peculiarities, which are hardly offered by the other sensing systems, such as compactness, lightness, high compatibility with optoelectronic devices (both sources and detectors), and multiplexing and remote measurement capability as the signal is spectrally modulated. During the last decade, the growing request in practical applications pushed the technology behind the OFG-based sensors over its limits by means of the deposition of thin film overlays, nanocoatings, and nanostructures, in general. Here, we review efforts toward utilizing these nanomaterials as coatings for high-performance and low-detection limit devices. Moreover, we review the recent development in OFG-based biosensing and identify some of the key challenges for practical applications. While high-performance metrics are starting to be achieved experimentally, there are still open questions pertaining to an effective and reliable detection of small molecules, possibly up to single molecule, sensing in vivo and multi-target detection using OFG-based technology platforms.

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Section: Fundamentalsmentioning

confidence: 99%

Biosensing with optical fiber gratings

et al. 2017

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“…16−18 A recent report shows that an SPR dip sensor that had a long-period fiber grating near the fiber tip measured the refractive index (RI) of a liquid with an accuracy of 1 × 10 −5 . 19 Microcantilever dip sensor was also considered. 20 An interferometry-based fiber optic dip sensor was developed that has a photonic crystal at the end.…”

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confidence: 99%

Whispering Gallery Mode Dip Sensor for Aqueous Sensing

Agarwal

Teraoka

2015

Anal. Chem.

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We report fabrication of a 4 mm thick, preassembled whispering gallery mode (WGM) sensor that can be repeatedly dipped into aqueous solutions and lifted. We built the viable photonic sensor assembly by bending an optical fiber by 90° and molding its tip into a sphere, thus, a long stem holding a submillimeter sensor at the end of a short arm of fiber, and positioning a pair of parallel cone-tipped tapers along the long stem so that the tips touch the sensor. Our sensor head is an optical fiber device just a few millimeters thick and yet has a sensitivity of the resonance wavelength shift comparable to the one obtained with conventional WGM sensors in a planar arrangement. Since dipping and lifting from the solution changes the temperature of the sensor, affecting the resonance wavelength, we enclosed a thermistor within the sensor head to monitor the temperature. We demonstrate that the resonance shift in repeated transfer of the sensor head between water and a solution of sucrose, after correction by the temperature change, is reproducible and agrees with a theoretical estimate of the shift for different concentrations.

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“…Different optical fiber structures, symmetrical or not, have been applied to perform SPR-based sensing, from a simple metal-coated optical fiber [108,109] to tapered fibers, D-shaped fibers [110][111][112], gratings [113,114], etc.…”

Section: Metallic Nano Thin Filmsmentioning

confidence: 99%

Fiber Optic Sensors Based on Nanostructured Materials

Elosúa

Hernáez

Matı́as

et al. 2014

Springer Series in Surface Sciences

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Fiber optic sensors have been developed taking advantage on the synergy between the properties of nanostructured materials and the ones that characterize an optical fiber. The mechanical properties of optical fiber introduce some restrictions to the techniques used for the deposition of materials. As an alternative to the classical deposition procedures, wet coating techniques have been successfully applied in these cases. The current chapter put emphasis on materials that can be incorporated using wet coating techniques. The first one presented is the multilayer based nanostructures: among the different alternatives, we have focused on materials prepared with the Layer-by-Layer technique. Another type of products used for the fabrication of optical fiber sensors is sol-gel matrices, which are made of silica, so that its optical properties are similar to the ones of an optical fiber. The other two described type of products have focused the attention of many researchers in the recent years. Firstly, materials with an enhanced selectivity are presented: the molecularly imprinted polymers (MIPs). Finally, sensors based on metallic nanolayers and particles are presented. All these materials and techniques have acquired a great importance in the field of optical fiber sensors due to their versatility and the good features that offer.

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Miniaturized Long-Period Fiber Grating Assisted Surface Plasmon Resonance Sensor

Cited by 83 publications

References 22 publications

Biosensing with optical fiber gratings

Biosensing with optical fiber gratings

Whispering Gallery Mode Dip Sensor for Aqueous Sensing

Fiber Optic Sensors Based on Nanostructured Materials

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