Quantum-enhanced plasmonic sensing

Dowran, Mohammadjavad; Kumar, Ashok; Lawrie, Benjamin J.; Pooser, Raphael C.; Marino, Alberto M.

doi:10.1364/optica.5.000628

Cited by 126 publications

(118 citation statements)

References 43 publications

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“…Quantum engineering of phase-sensitive states [16][17][18][19][111][112][113][114][115][116][117][118][119][120] has also been suggested as a way to realise quantum-enhanced two-photon lithography [121][122][123] and microscopy [124]. Intensity squeezing is also being investigated to improve the signal to noise ratio in imaging, by lowering the noise in photon detection below the shot noise limit [125][126][127][128][129][130][131][132][133][134].…”

Section: Applications To Imagingmentioning

confidence: 99%

A perspective on multiparameter quantum metrology: From theoretical tools to applications in quantum imaging

et al. 2020

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The interest in a system often resides in the interplay among different parameters governing its evolution. It is thus often required to access many of them at once for a complete description. Assessing how quantum enhancement in such multiparameter estimation can be achieved depends on understanding the many subtleties that come into play: establishing solid foundations is key to delivering future technology for this task. In this article we discuss the state of the art of quantum multiparameter estimation, with a particular emphasis on its theoretical tools, on application to imaging problems, and on the possible avenues towards the next developments.

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Section: Applications To Imagingmentioning

confidence: 99%

A perspective on multiparameter quantum metrology: From theoretical tools to applications in quantum imaging

et al. 2020

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“…It is clear that the maximum quantum squeezing can be more than 25 dB while the optimal sensitivity is less than 0.02 according to figure 5(a). This characteristic makes this scheme adaptable and it has been employed for the measurement of plasmonic sensing [26]. Figure 5(b) shows the optimal squeezing versus r. Overall, while r becomes higher, the optimal squeezing degree is superior and can reach more than 30 dB.…”

Section: Phase Sensitivity and Quantum Squeezingmentioning

confidence: 99%

“…the smaller D -I 2ˆ, the better phase sensitivity. The definition of intensity difference squeezing according to[26] is =…”

mentioning

confidence: 99%

Optimal phase sensitivity by quantum squeezing based on a Mach–Zehnder interferometer

Wang

et al. 2020

New J. Phys.

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A novel scheme for the enhancement of phase sensitivity based on a Mach-Zehnder interferometer (MZI) and intensity detection is proposed. With the input of bright entangled twin beams from four wave mixing (FWM), the phase sensitivity can beat shot noise limit (SNL) and approach Heisenberg limit. This scheme is special due to that only one of bright entangled twin beams enters into the MZI and the other one is employed for measurement. In addition, by altering the parametric strength of FWM and the implementation of maximum quantum squeezing, the optimal phase sensitivity can reach sub-SNL. Optical intensity depletion of photon detectors and internal intensity depletion of the MZI are also discussed. The scheme displays that by employing external resources, while one input of the MZI is an vacuum beam, the phase sensitivity still can beat SNL.

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“…polarization, spatial, temporal and spectral, which have been studied extensively [11,18,29]. However, the quantum fluctuations of photon-number degree of freedom and, moreover, the quasi-probability distribution in the phase space mark the difference between classical and non-classical optical fields, and are crucial for various quantum information applications [27,30,31]. Therefore, a complete understanding of the evolution of quantum fluctuations and coherence inside the plasmonic structure is indispensable.…”

Section: Introductionmentioning

confidence: 99%

Quantum tomography of the photon-plasmon conversion process in a metal hole array

Tang¹,

Zheng²,

Guo³

et al. 2019

Opt. Express

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In the past decades, quantum plasmonics has become an active area due to its potential applications in on-chip plasmonic devices for quantum information processing. However, the fundamental physical process, i.e., how a quantum state of light evolves in the photon-plasmon conversion process, has not been clearly understood. Here, we report a complete characterization of the plasmon-assisted extraordinary optical transmission process through quantum process tomography. By inputting various coherent states to interact with the plasmonic structure and detecting the output states with a homodyne detector, we reconstruct the process tensor of the photon-plasmon conversion process. Both the amplitude and phase information of the process are extracted, which explains the evolution of the quantum-optical state after the coupling with plasmons. Our experimental demonstration constitutes a fundamental block for future on-chip applications of quantum plasmonic circuits.

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Quantum-enhanced plasmonic sensing

Cited by 126 publications

References 43 publications

A perspective on multiparameter quantum metrology: From theoretical tools to applications in quantum imaging

A perspective on multiparameter quantum metrology: From theoretical tools to applications in quantum imaging

Optimal phase sensitivity by quantum squeezing based on a Mach–Zehnder interferometer

Quantum tomography of the photon-plasmon conversion process in a metal hole array

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