Theory of spectral hole burning for the study of ultrafast electron dynamics in metal nanoparticles

Vartanyan, T. A.; Bosbach, Johannes; Stietz, F.; Träger, F.

doi:10.1007/s003400100714

Cited by 42 publications

(34 citation statements)

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“…Recently, we have developed this method into a novel and versatile tool for the investigation of nanoparticles [18,19]. Furthermore, we have developed a theoretical model, which allows us to extract T 2 from the experimental data [20]. The main advantage of the technique is that it is not restricted to nanoparticles with a certain size or shape and can therefore be used for systematic investigations of T 2 as a function of all relevant parameters.…”

Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

“…To determine the width of the hole, the difference of the extinction spectra measured before and after laser irradiation has been calculated. Under certain simplifying conditions which are fulfilled in the experiments described below, our theoretical model gives the following analytical expression for the difference spectrum [20] dSðxÞ ¼ ÀA…”

Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

“…Using Eqs. (1) and (2) the homogeneous linewidth C hom can be obtained by fitting the spectral holes burned with different laser fluences U, and extrapolating the determined apparent hole widths C to zero value of U [20].…”

Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

“…Even though a number of experimental efforts has recently been made to determine T 2 [11][12][13][14][15][16][17][18][19][20][21], more information on the dephasing times for different metals are urgently needed. On the theoretical side, difficulties arise because of a large number of processes that contribute to dephasing of the plasmon.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dephasing times of surface plasmon excitation in Au nanoparticles determined by persistent spectral hole burning

Ziegler

Hendrich

Hubenthal

et al. 2004

Chemical Physics Letters

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Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

Section: Application Of Spectral Hole Burning To Surface Plasmon Excimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dephasing times of surface plasmon excitation in Au nanoparticles determined by persistent spectral hole burning

Ziegler

Hendrich

Hubenthal

et al. 2004

Chemical Physics Letters

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“…For both cases, the temperature rise is determined by the absorbed energy, the heat transfer from the nanoparticle to the substrate and the thermal conductivity of the substrate. 43 In the case of irradiation with cw light the deposited energy per time is relatively low and can be effectively transferred into the substrate. Therefore, the temperature rise in the nanoparticles is significant lower and leads to a less effective tailoring process compared to nanoparticles irradiated with ns pulsed laser pulses.…”

Section: Tailoring the Shapementioning

confidence: 99%

Irradiation of supported gold and silver nanoparticles with continuous-wave, nanosecond, and femtosecond laser light: a comparative study

et al. 2005

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Modification of metal nanoparticles with laser light has been a well-known technique for several years. Still, selective tailoring of certain sizes or shapes of nanoparticles has remained a challenge. In this paper, we present recent studies on tailoring the size and shape of supported nanoparticles with continuous-wave and femtosecond pulsed laser light and compare them to our results obtained with ns pulsed laser light. The underlying method is based on the size and shape dependent plasmon resonance frequencies of the nanoparticles. In principle, irradiation with a given laser photon energy excites and heats nanoparticles of certain sizes or/and shapes and leads to diffusion and evaporation of surface atoms. Thus, tailoring the dimensions of the nanoparticles can be accomplished. In our experiments, gold and silver nanoparticles were prepared under ultrahigh vacuum conditions by deposition of atoms and subsequent diffusion and nucleation, i.e. Volmer-Weber growth. This gives particle ensembles with size and shape distributions of approximately 30% -40%. The nanoparticle ensembles were irradiated with laser light either during or after growth. It turns out, that irradiation with cw or ns laser light makes possible selective modification of the nanoparticles. In contrast, application of fs laser pulses results in non-selective modification. For example, post-grown irradiation of supported gold nanoparticles with ns laser pulses (photon energy = 1.9 eV) causes a clear reduction of the width of the surface plasmon resonance from 0.52 eV to 0.20 eV (HWHM). Similar experiments were carried out with fs pulsed laser light (photon energy = 1.55 eV), which result in a slightly reduced line width but also, to an overall decrease of the extinction. A comparison of all experiments revealed, that for size or shape tailoring of supported metal nanoparticles best results have been achieved with ns pulsed laser light.

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2003

Introduction to Cluster Dynamics

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Theory of spectral hole burning for the study of ultrafast electron dynamics in metal nanoparticles

Cited by 42 publications

References 0 publications

Dephasing times of surface plasmon excitation in Au nanoparticles determined by persistent spectral hole burning

Dephasing times of surface plasmon excitation in Au nanoparticles determined by persistent spectral hole burning

Irradiation of supported gold and silver nanoparticles with continuous-wave, nanosecond, and femtosecond laser light: a comparative study

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