Fiber Optic Sensors Based on Plasmonics by Banshi Dhar Gupta, Sachin Kumar Srivastava, Roli Verma

By Banshi Dhar Gupta, Sachin Kumar Srivastava, Roli Verma

The e-book offers an creation of floor plasmons and provides its functions within the sensing of varied chemical and organic analyses utilizing optical fiber know-how. the sector is built via introducing the skin plasmons for semi-infinite steel dielectric interface with dialogue in their propagation size and penetration intensity. sensible concerns with the excitation of floor plasmons in several configurations and in a variety of geometries together with numerous technique of their excitation have additionally been integrated. The publication discusses the basic elements of fiber optic sensors, their services and the functionality parameters besides the theoretical description of fiber optic floor Plasmon Resonance (SPR) sensors with admire to varied gentle launching stipulations. The fabrication tools and protocols used for the fabrication of the fiber optic SPR chemical and biosensors were defined. a few fiber optic sensing purposes according to SPR phenomena and diverse concerns, resembling sensitivity enhancement, effect of exterior stimuli and so on, were an immense a part of the booklet. The e-book may help newbies in addition to confirmed researchers in realizing the basics and developments of optical fiber plasmonic sensor know-how. The e-book includes either the rigorous idea and the experimental innovations of SPR and comparable number of sensors.

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The mode with a wave-vector equal to that of SPs is found absent in the collected light resulting in the dip. 38) where m is the order of diffraction, can have both positive and negative integer values, and Λ is the grating element. For positive values of m, the resonance condition can be written as: kSP = 2π nd sin θ + m λ 2π . 39) The earlier condition can be satisfied only for a particular value of the angle of incidence. Thus the role of the grating is to supply a wave-vector of m 2π to kx = (kinc )x so that it can match with Λ the kSP .

The p-polarized light from a monochromatic source is incident at the base of the prism at an angle greater than the critical angle through one of the faces and is collected at the other face of the prism which is further fed into an optical power meter. The incidence at an angle greater than the critical angle results in the generation of an evanescent wave which propagates along the interface of the prism base and the medium in contact. The evanescent wave is used to excite SPs in both kinds of configurations.

Gupta, Fiber optic surface plasmon resonance-based three channels multi-analyte sensor, Chemical Sensors 3 (2013) 13. page 19 May 6, 2015 4:56 20 Fiber Optic Sensors Based on Plasmonics 9in x 6in b2025-ch01 Fiber Optic Sensors Based on Plasmonics 84. R. D. Gupta, SPR based three channels fiber optic sensor for aqueous environment, Proceedings of SPIE 8992 (2014) 899209. 85. R. D. Gupta, A novel approach for simultaneous sensing of urea and glucose by SPR based optical fiber multianalyte sensor, Analyst 139 (2014) 1449–1455.

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