Toward quantum plasmonic networks

Holtfrerich, Matthew; Dowran, Mohammadjavad; Davidson, Roderick B.; Lawrie, Benjamin J.; Pooser, Raphael C.; Marino, Alberto M.

doi:10.1364/optica.3.000985

Cited by 55 publications

(45 citation statements)

References 28 publications

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“…However, the role of pure phase damping is not completely negligible. Our work shows that both amplitude and pure phase damping can lead to decoherence in quantum plasmonic systems, and it provides useful information about the loss of coherence that should be considered when designing plasmonic waveguide systems for phase-sensitive quantum applications, such as quantum sensing [20][21][22][23] and quantum imaging [23,24]. The techniques developed here for characterising decoherence in plasmonic waveguides may be useful for studying other plasmonic nanostructures, such as those used as nanoantennas [4], as unit cells in metamaterials [63,64] and as nanotraps for cold atoms [65].…”

Section: Introductionmentioning

confidence: 89%

“…These nanophotonic devices are important for emerging quantum technologies, such as photonic-based quantum computers [16,17] and quantum communication networks [18]. Following on from early work probing SPPs with quantum states of light, such as entangled photons [19], recent studies have demonstrated several key quantum applications, including quantum sensing and imaging [20][21][22][23][24], quantum spectroscopy [25], quantum logic gates [26], entanglement generation [27] and distillation [28], and quantum random number generation [29]. What is surprising is that all of these applications can be realized even in the presence of loss, which is always present in plasmonic systems as they are scaled down to confine light to smaller scales.…”

Section: Introductionmentioning

confidence: 99%

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Probing Decoherence in Plasmonic Waveguides in the Quantum Regime

et al. 2018

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We experimentally investigate the decoherence of single surface plasmon polaritons in metal stripe waveguides. In our study we use a Mach-Zehnder configuration previously considered for measuring decoherence in atomic, electronic and photonic systems. By placing waveguides of different length in one arm we are able to measure the amplitude damping time T1 = 1.90 ± 0.01 × 10 −14 s, pure phase damping time T * 2 = 11.19±4.89×10 −14 s and total phase damping time T2 = 2.83±0.32×10 −14 s. We find that decoherence is mainly due to amplitude damping, and thus loss arising from inelastic electron and photon scattering plays the most important role in the decoherence of plasmonic waveguides in the quantum regime. However, pure phase damping is not completely negligible. The results will be useful in the design of plasmonic waveguide systems for carrying out phase-sensitive quantum applications, such as quantum sensing. The probing techniques developed may also be applied to other plasmonic nanostructures, such as those used as nanoantennas, as unit cells in metamaterials and as nanotraps for cold atoms.

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Probing Decoherence in Plasmonic Waveguides in the Quantum Regime

et al. 2018

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“…Surface-plasmon polariton lasers and amplifiers 1,2 , also known as microscopic/nanoscopic sources of light are important for providing and modulating linear and nonlinear interactions within subwavelength scales 3,4 . These nanophotonic elements are valuable in designing quantum-and nonlinear-photonic technologies such as an SPP frequency-comb generator 5 phase rotors 6 and quantum information processors 7,8 .…”

Section: Coherent Amplification and Inversion Less Lasing Of Surface mentioning

confidence: 99%

Coherent amplification and inversion less lasing of surface plasmon polaritons in a negative index metamaterial with a resonant atomic medium

Asgarnezhad-Zorgabad

2021

Sci Rep

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Surface plasmon polaritons (SPPs) lasing requires population inversion, it is inefficient and possesses poor spectral properties. We develop an inversion-less concept for a quantum plasmonic waveguide that exploits unidirectional superradiant SPP (SSPP) emission of radiation to produce intense coherent surface plasmon beams. Our scheme includes a resonantly driven cold atomic medium in a lossless dielectric situated above an ultra-low loss negative index metamaterial (NIMM) layer. We propose generating unidirectional superradiant radiation of the plasmonic field within an atomic medium and a NIMM layer interface and achieve amplified SPPs by introducing phase-match between the superradiant SPP wave and coupled laser fields. We also establish a parametric resonance between the weak modulated plasmonic field and the collective oscillations of the atomic ensemble, thereby suppressing decoherence of the stably amplified directional polaritonic mode. Our method incorporates the quantum gain of the atomic medium to obtain sufficient conditions for coherent amplification of superradiant SPP waves, and we explore this method to quantum dynamics of the atomic medium being coupled with the weak polaritonic waves. Our waveguide configuration acts as a surface plasmon laser and quantum plasmonic transistor and opens prospects for designing controllable nano-scale lasers for quantum and nano-photonic applications.

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“…This coherent conversion between photons and plasmons gives rise to a transmission through the sub-wavelength holes orders of magnitude greater than transmissions expected from diffraction theory, an effect known as extraordinary optical transmission (EOT) [25,26]. This process preserves the quantum properties of the light [27][28][29][30] and makes the use of quantum states of light a viable option to enhance the sensitivity of plasmonic sensors [23,24].…”

Section: Introductionmentioning

confidence: 99%

Quantum-enhanced plasmonic sensing

Dowran¹,

Kumar²,

Lawrie³

et al. 2018

Optica

120

109

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Quantum resources can enhance the sensitivity of a device beyond the classical shot noise limit and, as a result, revolutionize the field of metrology through the development of quantum-enhanced sensors. In particular, plasmonic sensors, which are widely used in biological and chemical sensing applications, offer a unique opportunity to bring such an enhancement to real-life devices. Here, we use bright entangled twin beams to enhance the sensitivity of a plasmonic sensor used to measure local changes in refractive index. We demonstrate a 56% quantum enhancement in the sensitivity of state-of-the-art plasmonic sensor with measured sensitivities on the order of 10 −10 RIU/ √ Hz, nearly 5 orders of magnitude better than previous proof-of-principle implementations of quantumenhanced plasmonic sensors. These results promise significant enhancements in ultratrace label free plasmonic sensing and will find their way into areas ranging from biomedical applications to chemical detection.

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Toward quantum plasmonic networks

Cited by 55 publications

References 28 publications

Probing Decoherence in Plasmonic Waveguides in the Quantum Regime

Probing Decoherence in Plasmonic Waveguides in the Quantum Regime

Coherent amplification and inversion less lasing of surface plasmon polaritons in a negative index metamaterial with a resonant atomic medium

Quantum-enhanced plasmonic sensing

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