Friction of the surface plasmon by high-energy particle-hole pairs

Seoanez, Cesar; Weick, Guillaume; Jalabert, Rodolfo A.; Weinmann, Dietmar

doi:10.1140/epjd/e2007-00195-4

Cited by 10 publications

(17 citation statements)

References 29 publications

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“…As can be seen in Fig. 2, the higher the frequency of the mode, the lower is its Landau damping linewidth, similarly to the case of an isolated nanoparticle [35]. Notice also that the dependence of γ σ,L q on the ratio ω 0 /E F is rather weak (thick and thin lines in Fig.…”

Section: A Landau Dampingmentioning

confidence: 53%

Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles

et al. 2016

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We investigate the collective plasmonic modes in a chain of metallic nanoparticles that are coupled by nearfield interactions. The size-and momentum-dependent nonradiative Landau damping and radiative decay rates are calculated analytically within an open quantum system approach. These decay rates determine the excitation propagation along the chain. In particular, the behavior of the radiative decay rate as a function of the plasmon wavelength leads to a transition from an exponential decay of the collective excitation for short distances to an algebraic decay for large distances. Importantly, we show that the exponential decay is of a purely nonradiative origin. Our transparent model enables us to provide analytical expressions for the polarization-dependent plasmon excitation profile along the chain and for the associated propagation length. Our theoretical analysis constitutes an important step in the quest for the optimal conditions for plasmonic propagation in nanoparticle chains.

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Section: A Landau Dampingmentioning

confidence: 53%

Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles

et al. 2016

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“…Whenω 1 /ω 2 = 1, the higher energy + mode is less damped than the lower-energy − one. This energy dependence is analogous to the single nanoparticle case, where higher mode frequencies correspond to lower values of the damping rates [34,35].…”

Section: Nonradiative and Radiative Decay Rates Of The Dark And Bmentioning

confidence: 78%

Decay of dark and bright plasmonic modes in a metallic nanoparticle dimer

et al. 2015

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We develop a general quantum theory of the coupled plasmonic modes resulting from the near-field interaction between localized surface plasmons in a heterogeneous metallic nanoparticle dimer. In particular, we provide analytical expressions for the frequencies and decay rates of the bright and dark plasmonic modes. We show that, for sufficiently small nanoparticles, the main decay channel for the dark plasmonic mode, which is weakly coupled to light and, hence, immune to radiation damping, is of nonradiative origin and corresponds to Landau damping, i.e., decay into electron-hole pairs.

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“…The dipolar LSPs have a dipole moment p = −eN e h(R)p, where e is the electronic charge, N e is the number of valence electrons in each nanoparticle, h(R) is the displacement field associated with the electronic centre-of-mass motion that corresponds to the LSP at position R, and p is the dipole unit vector. The LSP can be regarded as a bosonic mode, in particular when the size of the nanoparticle is small enough such that quantum size effects are important [47][48][49][50][51][52][53][54].…”

Section: Modelmentioning

confidence: 99%

Dirac plasmons in bipartite lattices of metallic nanoparticles

Sturges¹,

Woollacott²,

Weick³

et al. 2015

2D Mater.

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We study theoretically "graphene-like" plasmonic metamaterials constituted by two-dimensional arrays of metallic nanoparticles, including perfect honeycomb structures with and without inversion symmetry, as well as generic bipartite lattices. The dipolar interactions between localised surface plasmons in different nanoparticles gives rise to collective plasmons that extend over the whole lattice. We study the band structure of collective plasmons and unveil its tunability with the orientation of the dipole moments associated with the localised surface plasmons. Depending on the dipole orientation, we identify a phase diagram of gapless or gapped phases in the collective plasmon dispersion. We show that the gapless phases in the phase diagram are characterised by collective plasmons behaving as massless chiral Dirac particles, in analogy with electrons in graphene. When the inversion symmetry of the honeycomb structure is broken, collective plasmons are described as gapped chiral Dirac modes with an energy-dependent Berry phase. We further relax the geometric symmetry of the honeycomb structure by analysing generic bipartite hexagonal lattices. In this case we study the evolution of the phase diagram and unveil the emergence of a sequence of topological phase transitions when one hexagonal sublattice is progressively shifted with respect to the other.

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Friction of the surface plasmon by high-energy particle-hole pairs

Cited by 10 publications

References 29 publications

Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles

Nonradiative limitations to plasmon propagation in chains of metallic nanoparticles

Decay of dark and bright plasmonic modes in a metallic nanoparticle dimer

Dirac plasmons in bipartite lattices of metallic nanoparticles

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