Adiabatic passage mediated by plasmons: A route towards a decoherence-free quantum plasmonic platform

Rousseaux, Benjamin; Dzsotjan, D.; Francs, Gérard Colas des; Jauslin, H. R.; Couteau, Christophe; Guérin, S.

doi:10.1103/physrevb.93.045422

Cited by 40 publications

(34 citation statements)

References 34 publications

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“…In that case, the system is expected to behave more "classically" so that low-order cumulant expansions could provide a better approximation than in the cases studied here, in particular under driving by external coherent laser pulses. Furthermore, the capability of the method to treat an arbitrary spectral density could be exploited to study emitter dynamics in systems that are not well-described by a single or few cavity modes, such as found in complex nanoplasmonic or hybrid plasmonic-dielectric structures [10][11][12][13]42 .…”

Section: Discussionmentioning

confidence: 99%

“…Even for the case nonperturbative interactions between several emitters and arbitrary photonic structures, it was realized by Buhmann et al 40 , and later independently by several other groups 41,42 , that a unitary frequency-dependent basis transformation can be used to transform the local operatorsf(r, ω) to a set of new modes in such a way that only a single photonic mode interacts with each emitter at each frequency, with the the strength of the interaction encoded in the spectral density, J(r, ω) at the position r of the emitter. We note that one naturally arrives at the same picture by calculating the local density of EM states and using its relation with the decay rate and the dyadic Green's function 43 .…”

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confidence: 99%

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Cumulant expansion for the treatment of light–matter interactions in arbitrary material structures

Mónica

Silva

Feist

2020

The Journal of Chemical Physics

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Strong coupling of quantum emitters with confined electromagnetic modes of nanophotonic structures may be used to change optical, chemical and transport properties of materials, with significant theoretical effort invested towards a better understanding of this phenomenon. However, a full theoretical description of both matter and light is an extremely challenging task. Typical theoretical approaches simplify the description of the photonic environment by describing it as a single or few modes. While this approximation is accurate in some cases, it breaks down strongly in complex environments, such as within plasmonic nanocavities, and the electromagnetic environment must be fully taken into account. This requires the quantum description of a continuum of bosonic modes, a problem that is computationally hard. We here investigate a compromise where the quantum character of light is taken into account at modest computational cost. To do so, we focus on a quantum emitter that interacts with an arbitrary photonic spectral density and employ the cumulant or cluster expansion method to the Heisenberg equations of motion up to first, second and third order. We benchmark the method by comparing with exact solutions for specific situations and show that it can accurately represent dynamics for many parameter ranges.Light-matter interaction is of paramount importance for unraveling the laws of nature and its deep understanding allows us to control and manipulate physical and chemical systems. In particular, one can modify the properties of a quantum emitter simply by changing its electromagnetic environment, for example by enclosing it within an optical cavity. This may give rise to a change of the decay rate for spontaneous emission in the weak coupling regime, the so-called Purcell effect 1 , or to the appearance of hybrid light-matter states, socalled polaritons, in the strong-coupling regime 2-5 . Over the last decades, it has been shown that strong light-matter coupling can be achieved using a large variety of physical implementations as the "cavity" that provides the electromagnetic field confinement. These include Fabry-Perot cavities consisting of two mirrors 5 , propagating surface plasmon polaritons 6 , plasmonic hole 7 and nanoparticle arrays 8 , isolated plasmonic nanoparticles 9 and nanoparticle-on-mirror geometries 10,11 , as well as hybrid cavities combining plasmonic and dielectric materials [12][13][14] . In many of these systems, the electromagnetic field modes are not well-described by isolated lossy cavity modes, and a correct treatment demands theoretical approaches that are able to deal with the complexity of the electromagnetic field modes and their spectrum.In principle, to treat the problem of light-matter interaction, one can rely on the most general theory that describes light and matter on equal footing, i.e., quantum electrodynamics (QED) 15 . However, treating all light and matter degrees of freedom in the systems described above in a quantum mechanical way is an intractable problem and approx...

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Cumulant expansion for the treatment of light–matter interactions in arbitrary material structures

Mónica

Silva

Feist

2020

The Journal of Chemical Physics

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“…so thatÊ ω,n is the electric field operator associated to the LSP n mode. This leads us to define the bosonic creation operator for a given position of the emitter, satisfying the commutation relation [â ω ′ ,n ′ (r d ),â † ω,n (r d )] = δ(ω − ω ′ )δ n,n ′ [22,30] a ω,n (r d ) = 1 i κ ω,n (r d )…”

Section: The Hamiltonian Of the Coupled System Readŝmentioning

confidence: 99%

Non-hermitian Hamiltonian description for quantum plasmonics: from dissipative dressed atom picture to Fano states

Varguet

Rousseaux

Dzsotjan

et al. 2019

J. Phys. B: At. Mol. Opt. Phys.

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We derive effective Hamiltonians for a single dipolar emitter coupled to a metal nanoparticle (MNP) with particular attention devoted to the role of losses. For small particles sizes, absorption dominates and a non hermitian effective Hamiltonian describes the dynamics of the hybrid emitter-MNP nanosource. We discuss the coupled system dynamics in the weak and strong coupling regimes offering a simple understanding of the energy exchange, including radiative and non radiative processes. We define the plasmon Purcell factors for each mode. For large particle sizes, radiative leakages can significantly perturbate the coupling process. We propose an effective Fano Hamiltonian including plasmon leakages and discuss the link with the quasinormal mode description. We also propose Lindblad equations for each situation and introduce a collective dissipator for describing the Fano behaviour.

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“…Our modal design approach to engineer and modulate SP transmission in compact wavelength-size devices contribute to the recent strategies to embed active information processing functions into pure or hybrid plasmonic structures such as the insertion of phase changing material into gold transmission lines 49 or the ultrafast electrical switching of SP in indium tin oxide waveguides [50][51][52]. The diabolo structures examined in this work are merely one first example of the potential of modal engineering in pure plasmonic systems toward information processing and transfer in complex devices, which could be used to create new computing architectures for classical and quantum optical technology [38][39]53.…”

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confidence: 99%

Designing Plasmonic Eigenstates for Optical Signal Transmission in Planar Channel Devices

et al. 2018

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ABSTRACT. On-chip optoelectronic and all-optical information processing paradigms require compact implementation of signal transfer for which nanoscale surface plasmons circuitry offers relevant solutions. This work demonstrates the directional signal transmittance mediated by 2D plasmonic eigenmodes supported by crystalline cavities. Channel devices comprising two mesoscopic triangular input and output ports and sustaining delocalized, higher-order plasmon resonances in the visible to infra-red range are shown to enable the controllable transmittance and routing between two confined entry and exit ports coupled over a distance 2 exceeding 2 µm. The transmittance is attenuated by > 20dB upon rotating the incident linear polarization, thus offering a convenient switching mechanism. The optimal transmittance for a given operating wavelength depends on the geometrical design of the device that sets the spatial and spectral characteristic of the supporting delocalized mode. Our approach is highly versatile and opens the way to more complex information processing using pure plasmonic or hybrid nanophotonic architectures.

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Adiabatic passage mediated by plasmons: A route towards a decoherence-free quantum plasmonic platform

Cited by 40 publications

References 34 publications

Cumulant expansion for the treatment of light–matter interactions in arbitrary material structures

Cumulant expansion for the treatment of light–matter interactions in arbitrary material structures

Non-hermitian Hamiltonian description for quantum plasmonics: from dissipative dressed atom picture to Fano states

Designing Plasmonic Eigenstates for Optical Signal Transmission in Planar Channel Devices

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