期刊
ACS PHOTONICS
卷 3, 期 6, 页码 992-999出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.6b00082
关键词
plasmonic sensing; quantum metrology; quantum plasmonic sensing
类别
资金
- Ministry of Science, ICT and Future Planning (MISP) Korea, under the Information Technology Research Center (ITRC) [IITP-2016-R0992-16-1017]
- National Research Foundation of Korea (NRF) Grant - Korea government (MSIP) [2014R1A2A1A10050117]
- South African National Research Foundation
- South African National Institute for Theoretical Physics
- Marie Sklodowska-Curie Early Stage Researcher programme
- Marie Curie Training Network on Frontiers in Quantum Technologies
- European Office of Aerospace Science and Technology EOARD
- EPSRC [EP/M013812/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M013812/1] Funding Source: researchfish
- National Research Foundation of Korea [2014R1A2A1A10050117] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Photonic sensors have many applications in a range of physical settings, from measuring mechanical pressure in manufacturing to detecting protein concentration in biomedical samples. A variety of sensing approaches exist, and plasmonic systems in particular have received much attention due to their ability to confine light below the diffraction limit, greatly enhancing sensitivity. Recently, quantum techniques have been identified that can outperform classical sensing methods and achieve sensitivity below the so-called shot-noise limit. Despite this significant potential, the use of definite photon number states in lossy plasmonic systems for further improving sensing capabilities is not well studied. Here, we investigate the sensing performance of a plasmonic interferometer that simultaneously exploits the quantum nature of light and its electromagnetic field confinement. We show that, despite the presence of loss, specialized quantum resources can provide improved sensitivity and resolution beyond the shot-noise limit within a compact plasmonic device operating below the diffraction limit.
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