Fiber Optic Plasmonic Sensors: Past, Present and Future

Abstract

Abstract:We review various fiber optic sensors utilizing both the propagating and localized surface plasmon resonance techniques. The utilization of optical fibers in plasmon based sensing has provided several advantages in sensing of various physical, chemical and biochemical parameters. The article starts with a brief introduction of the propagating surface plasmon resonance (SPR) and localized surface plasmon resonance (LSPR), presents the review of some of the past studies on SPR and LSPR based state-of-the-art fiber optic sensors and finally ends with the future scope of the plasmonics based fiber optic sensors. In addition, we discuss some latest results on the plasmon enhanced whispering gallery mode sensors, which require tapered optical fibers for excitation. The present review may provide the researchers a rigorous and organized literature for the understanding of the basics, utility and trends of fiber optic plasmonic sensor in a chronological order.

Plasmonics for Biosensing

“…Gratings also can be used to match the wave vector of a SPP, as shown in Figure 2d. Later coupling techniques based on fibers/waveguides have also been developed [54].…”

Nanomaterials for early detection of cancer biomarker with special emphasis on gold nanoparticles in immunoassays/sensors

“…When light from the input end of the fiber reaches the nanoparticles by total internal reflection, the evanescent waves interact with the metal nanoparticles, resulting in wavelength dependent absorption (extinction). The changes in the evanescent field absorption before and after binding of analyte is determined from the transmitted light recorded at the output end of the fiber using a spectrophotometer/detector (Srivastava and Gupta, 2013). Krause et al (2013) Vio is an electrochemical redox indicator.…”

Application of Cavity Maxwell Garnett Theory in SPR Based Fiber Optic Sensor with Porous Alumina Structure

“…In fiber optic based SPR sensors small portion of cladding is removed from the middle portion of fiber and then is coated with a thin layer of plasmonic material Ag or Au in general. Subsequently a polychromatic light is launched from one end of the fiber such that the light gets guided using TIR phenomenon on the interface of its core and cladding [11]. This has some additional advantages in remote sensing and online monitoring [12].…”