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arXiv · 1705.05120

Quantum noise reduction in intensity-sensitive surface plasmon resonance sensors

Joong-Sung Lee·Trung Huynh·Su-Yong Lee·Kwang-Geol Lee·Jinhyoung Lee·Mark Tame·Carsten Rockstuhl·Changhyoup Lee
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Abstract

We investigate the use of twin-mode quantum states of light with symmetric statistical features in their photon number for improving intensity-sensitive surface plasmon resonance (SPR) sensors. For this purpose, one of the modes is sent into a prism setup where the Kretschmann configuration is employed as a sensing platform and the analyte to be measured influences the SPR excitation conditions. This influence modifies the output state of light that is subsequently analyzed by an intensity-difference measurement scheme. We show that quantum noise reduction is achieved not only as a result of the sub-Poissonian statistical nature of a single mode, but also as a result of the non-classical correlation of the photon number between the two modes. When combined with the high sensitivity of the SPR sensor, we show that the use of twin-mode quantum states of light notably enhances the estimation precision of the refractive index of an analyte. With this we are able to identify a clear strategy to further boost the performance of SPR sensors, which are already a mature technology in biochemical and medical sensing applications.

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Joong-Sung Lee, Trung Huynh, Su-Yong Lee, Kwang-Geol Lee, Jinhyoung Lee, Mark Tame, Carsten Rockstuhl, Changhyoup Lee. 2017-09-21. Quantum noise reduction in intensity-sensitive surface plasmon resonance sensors. https://doi.org/10.1103/physreva.96.033833

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