PatentDOI
Sensitivity enhancement in grating coupled surface plasmon resonance by azimuthal control
TLDR
In this article, a method and a system for the enhancement of the sensitivity in surface plasmon resonance (SPR) sensors based on metallic grating by exploiting the conical configuration is presented.Abstract:
A method and a system for the enhancement of the sensitivity in surface plasmon resonance (SPR) sensors based metallic grating by exploiting the conical configuration is presented. We consider the propagation of surface plasmon polaritons (SPPs) excited by light from the visible to infrared spectrum range, incident on a plasmonic grating at different directions by varying both the zenith and azimuthal angles. For specific azimuthal angles, SPPs propagate in the grating plane perpendicular to the incident light momentum. This is the condition that allows increasing the number of different excited SPPs modes largely. We exploit this effect to increase the sensor sensitivity with the change of refractive index of thin film on the plasmonic grating surface. Polarization effects also contribute to a further modes enhancement and increase the sensitivity. A scheme for a lab-on-chip implementation of a system that allows a parallel detection in microfluidic channels has been shown.read more
Citations
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Journal ArticleDOI
Enhanced gas sensing performance of TiO2 functionalized magneto-optical SPR sensors
Maria Grazia Manera,Giovanni Montagna,Elías Ferreiro-Vila,Lola González-García,Juan R. Sanchez-Valencia,Agustín R. González-Elipe,Alfonso Cebollada,José Miguel García-Martín,Antonio García-Martín,Gaspar Armelles,R. Rella +10 more
TL;DR: In this article, the results on the enhanced sensing capability of these TiO2 functionalized MO-SPR sensors with Au/Co/Au transducers with respect to traditional SPR gas sensors are presented.
Journal ArticleDOI
Nanoporous gold plasmonic structures for sensing applications
TL;DR: Due to its superior response, nanoporous gold patterns appear promising for the realization of compact plasmonic platforms for sensing purposes.
Journal ArticleDOI
Target-Localized Nanograting-Based Surface Plasmon Resonance Detection toward Label-free Molecular Biosensing
TL;DR: Numerical results confirm the numerical results that sensitivity enhancement by an order of magnitude may be feasible on a per-unit-volume basis through target localization through surface-relief nanograting structures.
Journal ArticleDOI
Surface-enhanced plasmon resonance detection of nanoparticle-conjugated DNA hybridization
TL;DR: The surface-enhanced plasmon resonance detection of DNA hybridization has been investigated and the sensitivity enhancement to be linearly related to nanoparticle volume is confirmed.
Journal ArticleDOI
Real-time detection of influenza A virus using semiconductor nanophotonics
TL;DR: Tests show that the nanophotonic chip can detect inactivated influenza A virus and bovine serum albumin with a sensitivity of 1.5 × 10–6 refractive index units and a time resolution as short as 2.2 s, which provides biomedical researchers with a convenient and affordable means of studying viral dynamics.
References
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Journal ArticleDOI
Localized Surface Plasmon Resonance Spectroscopy and Sensing
TL;DR: This review describes recent fundamental spectroscopic studies that reveal key relationships governing the LSPR spectral location and its sensitivity to the local environment, including nanoparticle shape and size and introduces a new form of L SPR spectroscopy, involving the coupling between nanoparticle plasmon resonances and adsorbate molecular resonances.
Journal ArticleDOI
Surface plasmon resonance sensors: review
TL;DR: Main application areas are outlined and examples of applications of SPR sensor technology are presented and future prospects of SPR technology are discussed.
Book
Surface Plasmons on Smooth and Rough Surfaces and on Gratings
TL;DR: In this article, surface plasmons on smooth surfaces were used for light scattering at rough surfaces without an ATR device, and surface plasmon on gratings for enhanced roughness.
Journal ArticleDOI
Formation of monolayer films by the spontaneous assembly of organic thiols from solution onto gold
Colin D. Bain,E. Barry Troughton,Yu-Tai Tao,Joseph Evall,George M. Whitesides,Ralph G. Nuzzo +5 more
TL;DR: In this paper, the authors used contact angles and optical ellipsometry to study the kinetics of adsorption of monolayer films and to examine the experimental conditions necessary for the formation of high-quality films.
Journal ArticleDOI
Structure and growth of self-assembling monolayers
TL;DR: In this article, the structural phases and the growth of self-assembled monolayers (SAMs) are reviewed from a surface science perspective, with emphasis on simple model systems, and a summary of the techniques used for the study of SAMs is given.