Optical waveguide biosensor based on cascaded Mach-Zehnder interferometer and ring resonator with Vernier effect

Xianxin Jiang; Longhua Tang; Jinyan Song; Mingyu Li; Jian-Jun He

doi:10.1117/12.2077943

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2 March 2015 Optical waveguide biosensor based on cascaded Mach-Zehnder interferometer and ring resonator with Vernier effect

Xianxin Jiang, Longhua Tang, Jinyan Song, Mingyu Li, Jian-Jun He

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Proceedings Volume 9310, Frontiers in Biological Detection: From Nanosensors to Systems VII; 931003 (2015) https://doi.org/10.1117/12.2077943
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Optical waveguide biosensors based on silicon-on-insulator (SOI) have been extensively investigated owing to its various advantages and many potential applications. In this article, we demonstrate a novel highly sensitive biosensor based on cascaded Mach-Zehnder interferometer (MZI) and ring resonator with the Vernier effect using wavelength interrogation. The experimental results show that the sensitivity reached 1,960 nm/RIU and 19,100 nm/RIU for sensors based on MZI alone and cascaded MZI-ring with Vernier effect, respectively. A biosensing application was also demonstrated by monitoring the interaction between goat and antigoat immunoglobulin G (IgG) pairs. This integrated high sensitivity biosensor has great potential for medical diagnostic applications.

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Xianxin Jiang, Longhua Tang, Jinyan Song, Mingyu Li, and Jian-Jun He "Optical waveguide biosensor based on cascaded Mach-Zehnder interferometer and ring resonator with Vernier effect", Proc. SPIE 9310, Frontiers in Biological Detection: From Nanosensors to Systems VII, 931003 (2 March 2015); https://doi.org/10.1117/12.2077943

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