Long-range surface plasmon Y-junctions for referenced biosensing

Wong, Wei Ru and Adikan, Faisal Rafiq Mahamd and Berini, P. (2015) Long-range surface plasmon Y-junctions for referenced biosensing. Optics Express, 23 (24). p. 31098. ISSN 1094-4087, DOI https://doi.org/10.1364/OE.23.031098.

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Official URL: http://dx.doi.org/10.1364/OE.23.031098


Long-range surface plasmon Y-junctions are demonstrated as sensors for the detection of bulk refractive index changes in solution and for protein binding. Using a fully-cladded Au stripe waveguide as a reference channel, common drift and noise in the system can be eliminated, relaxing the need for precise optical alignments. The performance of the structure is discussed theoretically, then bulk sensing is carried out experimentally with five solutions of different refractive indices, and protein sensing is demonstrated through physisorption of bovine serum albumin on a carboxyl-terminated Au stripe. The Y-junction biosensor demonstrated a very good ability to perform drift and noise suppression for fast and accurate biosensing.

Item Type: Article
Uncontrolled Keywords: Biochemistry; Body fluids; Fiber optic sensors; Proteins; Refractive index
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Sep 2018 08:01
Last Modified: 11 Oct 2018 02:11
URI: http://eprints.um.edu.my/id/eprint/19435

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