Enhancement in figure of merit of silver-gold bimetallic surface plasmon resonance sensor

Yan Huang; Peiyan Li; Chengxiang Wang; Zheli Yao; Guohui Lyu; Hongwei Li

doi:10.1117/12.2587112

24 December 2020 Enhancement in figure of merit of silver-gold bimetallic surface plasmon resonance sensor

Yan Huang, Peiyan Li, Chengxiang Wang, Zheli Yao, Guohui Lyu, Hongwei Li

Proceedings Volume 11608, Optics Frontiers Online 2020: Micro and Nanophotonics (OFO-4 2020); 1160809 (2020) https://doi.org/10.1117/12.2587112
Event: Optics Frontiers Online 2020: Micro and Nanophotonics (OFO-4 2020), 2020, Online Only

Abstract

In this work, a high figure of merit (FOM) surface plasmon resonance (SPR) with bimetallic layer (Au/Ag) based on wavelength and angular combined interrogations approach is presented. To further addition the performance of the SPR sensor, the sum of the minimum reflectivity (R_min) is calculated with the refractive index interval of 0.004 as a step from 1.33 to 1.37 at first. Then, the performance of the sensor is analyzed for varying silver-gold thickness. Our simulations indicate that the proposed configuration for Kretschmann’s SPR sensor should be silver (48 nm)-gold (1 nm) for achieving the best FOM (about 150 RIU^-1).

Citation Download Citation

Yan Huang, Peiyan Li, Chengxiang Wang, Zheli Yao, Guohui Lyu, and Hongwei Li "Enhancement in figure of merit of silver-gold bimetallic surface plasmon resonance sensor", Proc. SPIE 11608, Optics Frontiers Online 2020: Micro and Nanophotonics (OFO-4 2020), 1160809 (24 December 2020); https://doi.org/10.1117/12.2587112

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