Abstract
The survey focuses on the most significant contributions in the field of fiber optic plasmonic sensors (FOPS) in recent years. FOPSs are plasmonic sensor-based fiber optic probes that use an optical field to measure the biological agents. Owing to their high sensitivity, high resolution, and low cost, FOPS turn out to be potential alternatives to conventional biological fiber optic sensors. FOPS use optical transduction mechanisms to enhance sensitivity and resolution. The optical transduction mechanisms of FOPS with different geometrical structures and the photonic properties of the geometries are discussed in detail. The studies of optical properties with a combination of suitable materials for testing the biosamples allow for diagnosing diseases in the medical field.
Highlights
In recent years, the surface plasmon resonance (SPR)-based optical sensing of several quantities such as chemicals [1,2], temperature [3], pressure [4], force [5], environmental monitoring [6], optofluidic detection [7], food safety [8], and biological species [9,10], as illustrated in Figure 1 [11,12,13,14], has been proven to be advantageous
A quantum of a collective oscillation of free electrons that are confined evanescently on the surface surface of a metal surface induced by an electromagnetic field is known as surface plasmons (SPs), a of a metal surface induced by an electromagnetic field is known as surface plasmons (SPs), a term that term that was introduced by Ritchie in 1957 [37]
The sensing sensitivity of fiber optic plasmonic sensors (FOPS) can be determined by the degree of discrimination of resonance wavelength shift or intensity change caused by the variation of refractive index (RI) of the analyte, namely wavelength interrogation and amplitude interrogation
Summary
The surface plasmon resonance (SPR)-based optical sensing of several quantities such as chemicals [1,2], temperature [3], pressure [4], force [5], environmental monitoring [6], optofluidic detection [7], food safety [8], and biological species [9,10], as illustrated in Figure 1 [11,12,13,14], has been proven to be advantageous. Other combinations, namely, molybdenum disulfide, molybdenum diselenide, tungsten disulphide, and tungsten diselenide layers (transition metal dichalcogenides), have been developed [21,36] In this Sci. 949briefly discuss the different geometrical configurations of the SPR-based FOPS2 of various combinations of transition metal dichalcogenides for biomedical applications. We start this review with a brief discussion of some SPR-based FOPSs that find wide application because of their simple structure, compactness, high resolution, and sensitivity. The geometrical configurations of different FOPSs with single mode and multimode fibers for sensing applications are discussed [25,26]. We briefly discuss the different geometrical configurations of the SPR-based FOPS with various combinations of transition metal dichalcogenides for biomedical applications
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