Novel Optical Fiber-Based Structures for Plasmonics Sensors

Abstract

Optical fiber sensors based on surface plasma technology have many unique advantages in specific applications such as extreme environmental monitoring, physical parameter determination, and biomedical indicators testing. In recent decades, various kinds of fiber probes with special structures were developed according to special processing such as tapering, splicing, etching, fiber balls, grating etc. In this paper, the fabrication technology, characteristics, development status and application scenarios of different special optical fiber structures are briefly reviewed, including common processing equipment. Furthermore, many special novel optical fiber structures reported in recent years are summarized, which have been used in various kinds of plasmonic sensing work. Then, the fiber-plasmonic sensors for practical applications are also introduced and examined in detail. The main aim of this review is to provide guidance and inspiration for researchers to design and fabricate special optical fiber structures, thus facilitating their further research.

Plasmonic and metamaterial biosensors: a game-changer for virus detection

“…Therefore, part or all of the fiber cladding can be removed via chemical etching or by side-polishing methods, and nanoparticles or nanofilms can be deposited. Several optical fiber configurations such as unclad fibers, side-polished (or D-shaped) fibers, tapered, and U-shaped fibers have been demonstrated for sensing applications [106][107][108][109] . As a label-free method, these plasmonic biosensors detect biomolecular interactions with high sensitivity and low levels of detection (LOD).…”

“…Several optical fiber configurations such as unclad fibers, side-polished (or Dshaped) fibers, tapered, and U-shaped fibers have been demonstrated for sensing applications. [106][107][108][109] As a label-free method, these plasmonic biosensors detect biomolecular interactions with high sensitivity and low levels of detection (LOD). Their broadband operation, along with their structural flexibility and nanomaterial functionalization, makes plasmonic optical fiber-based biosensors ideal for real-time and in situ biosensing and healthcare applications.…”

“…Their broadband operation, along with their structural flexibility and nanomaterial functionalization, makes plasmonic optical fiber-based biosensors ideal for real-time and in situ biosensing and healthcare applications. 106,107,109…”

Plasmon–Exciton Coupling Effect in Nanostructured Arrays for Optical Signal Amplification and SARS-CoV-2 DNA Sensing

“… 36 , 37 For instance, combining LSPR of different NPs to optical fibers has demonstrated the advantages of miniaturization and portability in the detection of both small and large biomolecules. 38 , 39 Viral biosensors can be categorized based on their viral targets into antigen-, cell-, immune-, and DNA-based sensors. 40 − 44 The predictable and specific hybridization of the complementary bases that are based on nucleic acid hybridization of DNA-viral targets have demonstrated preserved reactivity, stability, accessibility, and low cost.…”

“…The need for newer methodologies for diagnosis of rapid turnaround time, simple operation, and direct readout continues to rise. Plasmonic-based sensors have displayed high detection speed, sensitivity, and portability and thus promising for disease diagnosis. , For instance, combining LSPR of different NPs to optical fibers has demonstrated the advantages of miniaturization and portability in the detection of both small and large biomolecules. , Viral biosensors can be categorized based on their viral targets into antigen-, cell-, immune-, and DNA-based sensors. − The predictable and specific hybridization of the complementary bases that are based on nucleic acid hybridization of DNA-viral targets have demonstrated preserved reactivity, stability, accessibility, and low cost.…”