Localized Surface Plasmon Resonance for Optical Fiber-Sensing Applications

Abstract

It is well known that optical fiber sensors have attracted the attention of scientific community due to its intrinsic advantages, such as lightweight, small size, portability, remote sensing, immunity to electromagnetic interferences and the possibility of multiplexing several signals. This field has shown a dramatic growth thanks to the creation of sensitive thin films onto diverse optical fiber configurations. In this sense, a wide range of optical fiber devices have been successfully fabricated for monitoring biological, chemical, medical or physical parameters. In addition, the use of nanoparticles into the sensitive thin films has resulted in an enhancement in the response time, robustness or sensitivity in the optical devices, which is associated to the inherent properties of nanoparticles (high surface area ratio or porosity). Among all of them, the metallic nanoparticles are of great interest for sensing applications due to the presence of strong absorption bands in the visible and near-infrared regions, due to their localized surface plasmon resonances (LSPR). These optical resonances are due to the coupling of certain modes of the incident light to the collective oscillation of the conduction electrons of the metallic nanoparticles. The LSPR extinction bands are very useful for sensing applications as far as they can be affected by refractive index variations of the surrounding medium of the nanoparticles, and therefore, it is possible to create optical sensors with outstanding properties such as high sensitivity and optical self-reference. In this chapter, the attractive optical properties of metal nanostructures and their implementation into different optical fiber configuration for sensing or biosensing applications will be studied.

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

“…Nevertheless, the vast majority of practically implemented technical diagnostic systems based on nanostructures use surface effects due to a strong increase in the role of surface atoms, for example, atoms of nanoparticles [23,24]. Such applications include, for example, devices for determining the change in the refractive index of liquids [25,26], solids [27,28], gases [29], the study of technological media [30,31]; devices for high-temperature ultrasonic diagnostics of metal plates [32 -34]. Therefore, the effects of the interaction of nanostructures with electromagnetic radiation are studied, taking into account the influence of the surface of the structure, as well as the thermal and mechanical processes associated with them.…”

Multifunctional Dyeing of Wool Fabrics Using Selenium Nanoparticles

“…The coloration of fabric/fiber can be achieved through a combination with metal nanoparticles by means of the particular optical properties of plasmon nanomaterials, called localized surface plasmon resonance (LSPR), producing brilliant and vivid colors, which are different from traditional dyes in that they are not the chromophore of traditional dyes but the shape and size of nanoparticles that determine the colors [ 31 , 32 ]. This has recently motivated research activities to directly employ metal nanoparticles in the dyeing of different textile substrates to overcome color fading and high water and energy consumption problems associated with conventional dyeing methods.…”

Possibilities of hardness measurement of composite coating based on ptfe with Al2O3 particles applied on aluminium substrate

“…1. Sol-gel method scheme [6] PTFE (polytetrafluorethylene) was used as the matrix and particles (micro and nano size) of Al 2 O 3 were selected as filler in the experiment that is the subject of this paper. The reason for using Al 2 O 3 is its good properties, which could increase the utility properties of PTFE coating.…”