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Figure 2: One of the widely used Polariton fiber sensor configura- tions. Ficure 1: (a) Otto configuration for the SPP excitation. (b) Kretschmann configuration for the SPP excitation. (c) Grating coupled SPP system. (d) Practical implementation of an SPP sensor.

Figure 2 One of the widely used Polariton fiber sensor configura- tions. Ficure 1: (a) Otto configuration for the SPP excitation. (b) Kretschmann configuration for the SPP excitation. (c) Grating coupled SPP system. (d) Practical implementation of an SPP sensor.

Related Figures (16)

Ficure 3: Side-polished Polariton fiber sensor.
Ficure 3: Side-polished Polariton fiber sensor.
Figure 5: Surface Plasmon resonance sensing structure with Bragg grating. Ficure 4: (a) Tapered fiber structure with uniform waist. (b) Cross section of the waist of the fiber with the metal coating
Figure 5: Surface Plasmon resonance sensing structure with Bragg grating. Ficure 4: (a) Tapered fiber structure with uniform waist. (b) Cross section of the waist of the fiber with the metal coating
Figure 7: Planar SPP sensor with (a) Bragg grating imprinted into the waveguide layer and (b) Bragg grating engraved on the top of the metal layer. Ficure 6: (a) Hollow core sensing structure with Bragg grating. (b) Cross section of the sensor.
Figure 7: Planar SPP sensor with (a) Bragg grating imprinted into the waveguide layer and (b) Bragg grating engraved on the top of the metal layer. Ficure 6: (a) Hollow core sensing structure with Bragg grating. (b) Cross section of the sensor.
Ficure 9: GM is the guided mode, and A is an attenuator. Insertion illustrates the MZI branch with the Bragg grating. The other MZI branch is identical to the shown one, but without the grating. The SPP travels in the opposite direction if an LPG is used. Figure 8: Planar SPP sensor with (a) LPG imprinted into the waveguide layer and (b) LPG engraved on the top of the metal layer.
Ficure 9: GM is the guided mode, and A is an attenuator. Insertion illustrates the MZI branch with the Bragg grating. The other MZI branch is identical to the shown one, but without the grating. The SPP travels in the opposite direction if an LPG is used. Figure 8: Planar SPP sensor with (a) LPG imprinted into the waveguide layer and (b) LPG engraved on the top of the metal layer.
Figure 10: Dependence between the refractive index of the sensed medium (Nsens) and the phase of the guided mode transmitted through the grating (g) for three structures with the thickness of the metal layer A = 10 nm, A = 12nm, and A = 13 nm.
Figure 10: Dependence between the refractive index of the sensed medium (Nsens) and the phase of the guided mode transmitted through the grating (g) for three structures with the thickness of the metal layer A = 10 nm, A = 12nm, and A = 13 nm.
Figure 12: The tilted grating assisted SPR sensor. The guided mode is scattered into a set of counter-propagating cladding modes via the tilted grating. Some are coupled to the SPP in the thin gold layer deposited on the fiber. The introduction on the analyte on the surface of the metal coating changes the details of the resonances spectra at the output [28, 29]. Figure 11: A dual LPG-based SPR sensor. The first LPG couples a guided mode to a particular cladding mode which has a small SPP component (the hybrid mode). The second step is the recoupling of the hybrid surface Plasmon wave back to the guided mode at the output of the fibre. A phase change is imparted by the introduction of the analyte, which detunes the coupling at the second LPG, resulting in an amplitude change at the output [27].
Figure 12: The tilted grating assisted SPR sensor. The guided mode is scattered into a set of counter-propagating cladding modes via the tilted grating. Some are coupled to the SPP in the thin gold layer deposited on the fiber. The introduction on the analyte on the surface of the metal coating changes the details of the resonances spectra at the output [28, 29]. Figure 11: A dual LPG-based SPR sensor. The first LPG couples a guided mode to a particular cladding mode which has a small SPP component (the hybrid mode). The second step is the recoupling of the hybrid surface Plasmon wave back to the guided mode at the output of the fibre. A phase change is imparted by the introduction of the analyte, which detunes the coupling at the second LPG, resulting in an amplitude change at the output [27].
Figure 13: Refractive index of an analyte determined from the changes in the intensities of the cladding mode resonances (Adapted from [28]).
Figure 13: Refractive index of an analyte determined from the changes in the intensities of the cladding mode resonances (Adapted from [28]).
Figure 14: A proposal for a PVDF coated Teflon fibre SPR gas sensor (Adapted from [31]).
Figure 14: A proposal for a PVDF coated Teflon fibre SPR gas sensor (Adapted from [31]).
Figure 15: The cross-section of a proposed three section hybrid mode SPR sensor [32] in silica glass fiber.
Figure 15: The cross-section of a proposed three section hybrid mode SPR sensor [32] in silica glass fiber.
Figure 16: End-fire coupled SPP using a thin SPP waveguide. The optical fiber excites the SPP directly, and the metal grating ensures phase-matching [34]. By reducing the lateral dimension, one of the major problems of SPPs, that is, transmission loss, is greatly ameliorated and light can be coupled into the output fiber for making measurements.
Figure 16: End-fire coupled SPP using a thin SPP waveguide. The optical fiber excites the SPP directly, and the metal grating ensures phase-matching [34]. By reducing the lateral dimension, one of the major problems of SPPs, that is, transmission loss, is greatly ameliorated and light can be coupled into the output fiber for making measurements.
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