Surface Plasmon Damping Quantified with an Electron Nanoprobe

Bosman, Michel; Ye, Enyi; Tan, Shu Fen; Nijhuis, Christian A.; Yang, Joel K. W.; Marty, Renaud; Mlayah, Adnen; Arbouet, Arnaud; Girard, Christian; Han, Ming‐Yong

doi:10.1038/srep01312

Cited by 140 publications

(159 citation statements)

References 46 publications

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“…However, SPR lifetime can be influenced by radiative damping and surface scattering, and in most nano-particles studies, the SPR resonances spectrally overlap with interband transitions. [21,22,25,74] It is worth noting, however, that our measured τ = 17 ± 3 fs is consistent with the longest value of τ = 13 fs based on plasmonic resonance linewidth of a silver nano-particle at room temperature. [21,22,25] Interband effects…”

Section: Comparison Of Drude Parameters With Literature Valuesmentioning

confidence: 60%

Optical dielectric function of silver

et al. 2015

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The dielectric function of silver is a fundamental quantity related to its electronic structure and describes its optical properties. However, results published over the past six decades are in part inconsistent and exhibit significant discrepancies. The measurement is experimentally challenging with the values of dielectric function spanning over five orders of magnitude from the mid-infrared to the visible/ultraviolet spectral range. Using broadband spectroscopic ellipsometry, we determine the complex valued dielectric function of evaporated and template stripped polycrystalline silver films from 0.05 eV (λ = 25 µm) to 4.14 eV (λ = 300 nm) with a statistical uncertainty of less than 1%. From Drude analysis of the 0.1 -3 eV range, values of the plasma frequency ω p = 8.9 ± 0.2 eV, dielectric function at infinite frequency ∞ = 5 ± 2, and relaxation time τ = 1/Γ = 17 ± 3 fs are obtained, with the absolute uncertainties estimated from systematic errors and experimental repeatability. Further analysis based on the extended Drude model reveals an increase in τ with decreasing frequency in agreement with Fermi liquid theory, and extrapolates to τ 22 fs for zero frequency. A deviation from simple Fermi liquid behavior is suggested at energies below 0.1 eV (λ = 12 µm) with the onset of a further increase in τ connecting to the DC value from transport measurements of ∼ 40 fs. The results are consistent with a wide range of optical and plasmonic experiments throughout the infrared and visible/ultraviolet spectral range. The influence of grain boundaries, defect scattering, and surface oxidation is discussed. The results are compared with our previous measurements of the dielectric function of gold [Phys. Rev. B 86, 235147 (2012)].

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Section: Comparison Of Drude Parameters With Literature Valuesmentioning

confidence: 60%

Optical dielectric function of silver

et al. 2015

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“…31 By taking advantage of the improved energy resolution, EELS can be potentially used as a quantitative tool, for instance, to gauge damping effects in single particles and/or to measure the electron kinetics of single plasmonic modes. 33 Prerequisite to achieving quantitative LSP analysis is attaining an experimental energy resolution that is finer than the natural line width of the plasmon resonance of interest. In Figure 7, we illustrate the effect of energy resolution (and signal-tonoise) ratio on EELS observables, by examining the spectra collected at proximal locations on/around the nanobar using different microscope settings (integrated over a four times larger area at the lower energy resolution).…”

Section: Imaging Surface Plasmons With Electron Energy Loss Spectroscopymentioning

confidence: 99%

Visualizing surface plasmons with photons, photoelectrons, and electrons

El‐Khoury

Abellán

Gong

et al. 2016

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Both photons and electrons may be used to excite surface plasmon polaritons, the collective charge density fluctuations at the surface of metal nanostructures. By virtue of their nanoscopic and dissipative nature, a detailed characterization of surface plasmon (SP) eigenmodes in real space-time ultimately requires joint nanometer spatial and femtosecond temporal resolution.The latter realization has driven significant developments in the past few years, aimed at interrogating both localized and propagating SP modes. In this mini-review, we briefly highlight different techniques employed by our own groups to visualize the enhanced electric fields associated with SPs. Specifically, we discuss recent hyperspectral optical microscopy, tipenhanced Raman nano-spectroscopy, nonlinear photoemission electron microscopy, as well as correlated scanning transmission electron microscopy-electron energy loss spectroscopy measurements targeting prototypical plasmonic nanostructures and constructs. Through selected practical examples from our own laboratories, we examine the information content in multidimensional images recorded by taking advantage of each of the aforementioned techniques. In effect, we illustrate how SPs can be visualized at the ultimate limits of space and time.

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“…In the case of the former, efforts have focused on metal alloys [26][27][28], highly doped semiconductors [29][30][31][32][33] and more recently, graphene [34][35][36][37][38][39][40]. While the spectral range for localized plasmonic modes has been successfully pushed into the infrared using such materials, the plasmonic origin of the modes implies that they are still limited by the relatively fast electron/plasma scattering (typically on the order of 10-100 fs) [41][42][43]. On the other hand, the use of dielectric materials can dramatically reduce optical losses [44][45][46][47][48][49][50], but resonators with sub-diffraction optical confinement cannot be achieved using positive permittivity materials.…”

Section: Introduction To Surface Phonon Polaritonsmentioning

confidence: 99%

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

et al. 2015

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Abstract:The excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on providing an understanding of the general phenomenon, including the origin of the Reststrahlen band, the role that optical phonons in polar dielectric lattices play in supporting sub-diffraction-limited modes and how the relatively long optical phonon lifetimes can lead to the low optical losses observed within these materials. Based on this overview, the achievements attained to date and the potential technological advantages of these materials are discussed for localized modes in nanostructures, propagating modes on surfaces and in waveguides and novel metamaterial designs, with the goal of realizing low-loss nanophotonics and metamaterials in the mid-infrared to terahertz spectral ranges.

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Surface Plasmon Damping Quantified with an Electron Nanoprobe

Cited by 140 publications

References 46 publications

Optical dielectric function of silver

Optical dielectric function of silver

Visualizing surface plasmons with photons, photoelectrons, and electrons

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

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