Ultrafast relaxation of electrons probed by surface plasmons at a thin silver film

Groeneveld, Rogier H. M.; Sprik, R.; Lagendijk, Ad

doi:10.1103/physrevlett.64.784

Cited by 146 publications

(70 citation statements)

References 12 publications

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“…It should be mentioned that recently a modified pump-probe technique has been used to study the ultrafast relaxation of electrons probed by surface plasmons in silver films [30]. The curves of ARIR observed show the same features as those are discussed here.…”

Section: Application To Silversupporting

confidence: 75%

Nonequilibrium Thermoreflectance Evolution of Laser Irradiated Noble Metals

Wenschuh

Heiner

1990

Physica Status Solidi (b)

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A theory for the evalution of the optical properties of laser irradiated noble metal layers in a thermalized nonequilibrium stage presented recently is applied to the calculation of transient thermoreflectance alterations in gold, silver, and copper. An improvement of the theory that simplifies direct comparisons with experiments is given after the introduction of the laser intensity into the interacting term of the model Hamiltonian which describes the coupling of the laser field to the electron system. Numerical results are discussed in view of new time-resolved pump-probe-experiments.Eine kiirzlich vorgestellte Theorie zur Berechnung der optischen Eigenschaften von laserbestrahlten Edelmetallschichten im thermalisierten Nichtgleichgewicht wird auf die Berechnung von zeitlich sich andernden Thermo-Reflexionsanderungen in Gold, Silber und Kupfer angewandt. Es wird eine einfache Verbesserung der Theorie in bezug auf direkte Vergleiche mit Experimenten durch die Einfuhrung der Laserintensitat in den die Kopplung des Laserfeldes an das Elektronensystem beschreibenden Wechselwirkungsterm des Modell-Hamiltonoperators angegeben. Numerische Resultate werden anhand von neueren zeitaufgelosten Anrege-Abfrage-Experimenten diskutiert.

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Section: Application To Silversupporting

confidence: 75%

Nonequilibrium Thermoreflectance Evolution of Laser Irradiated Noble Metals

Wenschuh

Heiner

1990

Physica Status Solidi (b)

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“…The electron-phonon coupling strength is difficult to determine. Experimentally, this quantity may be obtained by evaluating ablation rates 47 , measuring the thermoreflectance 48 or optical reflection 49 . However, these experiments are often performed at low laser intensities, which are not comparable to the SHI irradiation scenario.…”

Section: Discussionmentioning

confidence: 99%

Graphitic nanostripes in silicon carbide surfaces created by swift heavy ion irradiation

et al. 2014

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The controlled creation of defects in silicon carbide represents a major challenge. A wellknown and efficient tool for defect creation in dielectric materials is the irradiation with swift (E kin Z500 keV/amu) heavy ions, which deposit a significant amount of their kinetic energy into the electronic system. However, in the case of silicon carbide, a significant defect creation by individual ions could hitherto not be achieved. Here we present experimental evidence that silicon carbide surfaces can be modified by individual swift heavy ions with an energy well below the proposed threshold if the irradiation takes place under oblique angles. Depending on the angle of incidence, these grooves can span several hundreds of nanometres. We show that our experimental data are fully compatible with the assumption that each ion induces the sublimation of silicon atoms along its trajectory, resulting in narrow graphitic grooves in the silicon carbide matrix.

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“…The fast decay with a time constant of 7 ps is attributed to electronic relaxation due to electron-phonon coupling [23]. This decay is slower than that in bulk gold films [58][59][60][61] and the difference is attributed to a combination of less hot electron transport and weaker electronphonon coupling in these nano-particles than in the bulk [23]. It was found, however, that the decay is much faster than predicted by theory for clean, "bare" particles [62,63], indicating that the surface imperfection due to surface adsorbates and defects may be playing an important role in the electronic relaxation process in colloidal metal particles [23].…”

Section: 8mentioning

confidence: 99%

Preparation and ultrafast optical characterization of metal and semiconductor colloidal nano-particles

Smith

Waters

Faulhaber

et al. 1997

J Sol-Gel Sci Technol

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Abstract. The ultrafast dynamics of photoinduced electrons in several metal and semiconductor colloidal nanoparticle systems are characterized using femtosecond laser spectroscopy. Various preparation methods are used and, in several cases, modified for making particles with long-term stability and narrow and controllable size distributions. The particle size and size distribution are determined using transmission electron microscopy and electronic absorption spectroscopy. For aqueous gold and silver colloids, spatial size confinement is found to cause substantially slower electronic relaxation due to reduction of non-equilibrium electron transport and weaker electron-phonon coupling. In gold colloids, photoejection of electrons into the liquid is observed, which is attributed to a two-photon enhanced ionization process. The effect of surfactant on the electron dynamics in CdS colloids is examined and found to be significant, substantiating the notion that electrons are dominantly trapped at the liquid-solid interface. In Ru3+-doped TiO2 colloids, the electronic decay is found to be as fast as or even faster than in undoped TiO2 and other semiconductor colloids such as CdS, suggesting that ion doping of large bandgap semiconductor colloids is not necessarily effective in lengthening the election lifetime. In almost all cases studied, the majority of the photoinduced electrons are found to decay within a few tens of picoseconds due to non-radiative relaxation. The results are discussed in the context of the potential applications of metal and semiconductor nano-particles in areas including photocatalysis and photoelectrochemistry.

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Ultrafast relaxation of electrons probed by surface plasmons at a thin silver film

Abstract: Ultrafast relaxation of electrons probed by surface plasmons at a thin silver film Groeneveld, R.H.M.; Sprik, R.; Lagendijk, A.

Cited by 146 publications

References 12 publications

Nonequilibrium Thermoreflectance Evolution of Laser Irradiated Noble Metals

Nonequilibrium Thermoreflectance Evolution of Laser Irradiated Noble Metals

Graphitic nanostripes in silicon carbide surfaces created by swift heavy ion irradiation

Preparation and ultrafast optical characterization of metal and semiconductor colloidal nano-particles

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