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Quantum noise reduction in intensity-sensitive surface-plasmon-resonance sensors

Title
Quantum noise reduction in intensity-sensitive surface-plasmon-resonance sensors
Author
이광걸
Keywords
PHASE; METROLOGY; STATES; LOSSY; ENTANGLEMENT; OPTICS
Issue Date
2017-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW A, v. 96, no. 3, Article no. 033833
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 nonclassical 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.
URI
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.033833https://repository.hanyang.ac.kr/handle/20.500.11754/115508
ISSN
2469-9926; 2469-9934
DOI
10.1103/PhysRevA.96.033833
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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