Fluoride Fiber Sensor With Huge Performance Enhancement via Optimum Radiative Damping at Ag-Al2O3-Graphene Heterojunction on Silicon

Sharma, Anuj Kumar and Dominic, Anumol and Kaur, Baljinder and Popescu, Vasile A (2019) Fluoride Fiber Sensor With Huge Performance Enhancement via Optimum Radiative Damping at Ag-Al2O3-Graphene Heterojunction on Silicon. In: JOURNAL OF LIGHTWAVE TECHNOLOGY, 37 (22). pp. 5641-5646.

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Abstract

Surface plasmon resonance-based fiber optic sensor with multilayer heterojunction is simulated and analyzed. The constituent materials are ZBLAN fluoride core, NaF clad, amorphous Si layer, Ag layer, Al2O3 interlayer, and graphene monolayer. The main idea behind the study is to optimize the radiative damping (i.e., optimum radiative damping, ORD) at the Ag-Al2O3-graphene heterojunction in order to enhance the sensors figure of merit (FOM) as much as possible. The effect of graphene monolayers presence on sensors FOM is also examined. Multiple occurrences of ORD may be achieved by coordinated variation of Ag and Al2O3 layer thicknesses along with light wavelength. Among the several prominent ORD conditions, the combination of 45.3-nm-thick Ag layer, 11-nm-thick Al2O3 layer, and 938.7-nm wavelength leads to a massively large FOM of 31806.65 RIU-1. The above FOM of the FOSPR sensor is nearly six times that for the corresponding prism-based SPR sensor (i.e., 5500 RIU-1) reported earlier with Al2O3 interlayer and MoS2 monolayer at 1200nm. Further, the proposed sensor provides substantially greater FOM compared to existing prism-based and FOSPR sensors.

Item Type:	Journal Article
Publication:	JOURNAL OF LIGHTWAVE TECHNOLOGY
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copyright of this article belongs to IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords:	Optical fiber sensors; Plasmons; Aluminum oxide; Graphene; Optical fiber polarization; Plasmons; optical fiber sensors; nanomaterials; aluminum compound; performance analysis
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	28 Jan 2020 10:26
Last Modified:	28 Jan 2020 10:26
URI:	http://eprints.iisc.ac.in/id/eprint/64208

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