Optically Induced Damping of the Surface Plasmon Resonance in Gold Colloids

Perner, M.; Bost, P.; Lemmer, Uli; Plessen, G. von; Feldmann, Jochen; Becker, Uwe; Mennig, Martin; Schmitt, Mike; Schmidt, Helmut K.

doi:10.1103/physrevlett.78.2192

Cited by 311 publications

(325 citation statements)

References 17 publications

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“…The measured electron-phonon relaxation times depend on the laser pump power 2,3,7 and are on the order of a few picoseconds (1-4 ps). [1][2][3][4][5][6][7][8][9][10][11][12][13] The results obtained for the nanoparticles furthermore compare well with the electronphonon coupling constant measured for bulk gold 28 using similar time-resolved laser techniques. These experiments have mainly been carried out in the low excitation limit in which the temperature of the nanoparticle lattice is raised only by a few tens of degrees (strongly depending on the particle size and laser pump power).…”

Section: Introductionsupporting

confidence: 61%

“…In the case of a femtosecond laser pulse the absorption of photons by the electrons (100 fs [1][2][3][4][5][6][7][8][9][10][11][12] ), electron-phonon relaxation (heating of the lattice < 10 ps [1][2][3][4][5][6][7][8][9][10][11][12] ), melting (30-35 ps 29 ), and phonon-phonon relaxation (cooling of the lattice > 100 ps 4,7,9 ) are well separated in time. Indeed, they can be thought of as sequential processes.…”

Section: Direct Comparison Between the Irradiation Effects Caused By mentioning

confidence: 99%

“…This can then lead to size [14][15][16][17] and shape [18][19][20] changes of the nanoparticles before the deposited laser energy can be released to the surrounding medium by phonon-phonon interactions which are usually on the order of 100 ps. 4,7 It was recently reported 29 that gold nanorods prepared by an electrochemical method 30 and encapsulated in micelles in aqueous solution undergo a rod-to-sphere shape transformation within about 30 ps due to melting of the nanorods.…”

Section: Introductionmentioning

confidence: 99%

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Laser-Induced Shape Changes of Colloidal Gold Nanorods Using Femtosecond and Nanosecond Laser Pulses

2000

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Gold nanorods have been found to change their shape after excitation with intense pulsed laser irradiation. The final irradiation products strongly depend on the energy of the laser pulse as well as on its width. We performed a series of measurements in which the excitation power was varied over the range of the output power of an amplified femtosecond laser system producing pulses of 100 fs duration and a nanosecond optical parametric oscillator (OPO) laser system having a pulse width of 7 ns. The shape transformations of the gold nanorods are followed by two techniques: (1) visible absorption spectroscopy by monitoring the changes in the plasmon absorption bands characteristic for gold nanoparticles; (2) transmission electron microscopy (TEM) in order to analyze the final shape and size distribution. While at high laser fluences (∼1 J cm -2 ) the gold nanoparticles fragment, a melting of the nanorods into spherical nanoparticles (nanodots) is observed when the laser energy is lowered. Upon decreasing the energy of the excitation pulse, only partial melting of the nanorods takes place. Shorter but wider nanorods are observed in the final distribution as well as a higher abundance of particles having odd shapes (bent, twisted, φ-shaped, etc.). The threshold for complete melting of the nanorods with femtosecond laser pulses is about 0.01 J cm -2 . Comparing the results obtained using the two different types of excitation sources (femtosecond vs nanosecond laser), it is found that the energy threshold for a complete melting of the nanorods into nanodots is about 2 orders of magnitude higher when using nanosecond laser pulses than with femtosecond laser pulses. This is explained in terms of the successful competitive cooling process of the nanorods when the nanosecond laser pulses are used. For nanosecond pulse excitation, the absorption of the nanorods decreases during the laser pulse because of the bleaching of the longitudinal plasmon band. In addition, the cooling of the lattice occurring on the 100 ps time scale can effectively compete with the rate of absorption in the case of the nanosecond pulse excitation but not for the femtosecond pulse excitation. When the excitation source is a femtosecond laser pulse, the involved processes (absorption of the photons by the electrons (100 fs), heat transfer between the hot electrons and the lattice (<10 ps), melting (30 ps), and heat loss to the surrounding solvent (>100 ps) are clearly separated in time.

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Section: Introductionsupporting

confidence: 61%

Section: Direct Comparison Between the Irradiation Effects Caused By mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laser-Induced Shape Changes of Colloidal Gold Nanorods Using Femtosecond and Nanosecond Laser Pulses

2000

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“…The origins of plasmon decay and dephasing have been extensively discussed in the literature, 14,42 and T 2 has been determined both using time-resolved pump-probe measurements [43][44][45][46] and higher harmonic generation. 47 For small Au nanospheres in air and low-index matrixes, plasmon excitation competes with interband transitions, leading to low Q factors ϳ10, while radiation damping dominates for larger spheres with diameters of about 100 nm.…”

Section: Local Field Enhancement Around Metal Nanoparticle Structumentioning

confidence: 99%

Plasmonics: Localization and guiding of electromagnetic energy in metal/dielectric structures

Maier

Atwater

2005

Journal of Applied Physics

1,793

1,245

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We review the basic physics of surface-plasmon excitations occurring at metal/dielectric interfaces with special emphasis on the possibility of using such excitations for the localization of electromagnetic energy in one, two, and three dimensions, in a context of applications in sensing and waveguiding for functional photonic devices. Localized plasmon resonances occurring in metallic nanoparticles are discussed both for single particles and particle ensembles, focusing on the generation of confined light fields enabling enhancement of Raman-scattering and nonlinear processes. We then survey the basic properties of interface plasmons propagating along flat boundaries of thin metallic films, with applications for waveguiding along patterned films, stripes, and nanowires. Interactions between plasmonic structures and optically active media are also discussed.

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“…Here, we present the main different approaches and the most recent developments, before applying them in the last section to the determination of the role of some thermal effects in the nonlinear optical response of nanocomposites. 6263646566676869707172 The response of a nanocomposite medium to a laser pulse is ruled by a series of different mechanisms, each exhibiting its own dynamics [62][63][64][65][66][67][68][69][70][71][72]: light energy absorption by electrons, redistribution within the conduction electron gas through electron-electron collisions, relaxation toward metal lattice by electron-phonon scattering, and then particle cooling down by heat transfer to the surrounding medium. Note that the short time domain of the relaxation -the first few picoseconds after excitation -has been widely investigated by several groups [62,65,68,70].…”

Section: Dynamics Of Thermal Exchanges In Nanocomposite Media Under Pmentioning

confidence: 99%

Gold nanoparticle assemblies: interplay between thermal effects and optical response

et al. 2008

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The optical response of materials based on gold nanoparticle assemblies depends on many parameters regarding both material morphology and light excitation characteristics. In this paper, the interplay between the optical and thermal responses of such media is particularly investigated under its theoretical aspect. Both conventional and original modeling approaches are presented and applied to concrete cases. We first show how the interaction of light with matrix-embedded gold nanoparticles can result in the generation of thermal excitations through different energy exchange mechanisms. We then describe how thermal processes can affect the optical response of a nanoparticle assembly. Finally, we connect both aspects and point out their involvement in the nonlinear optical response of nanocomposite media. This allows us to tackle two key issues in the field of third-order nonlinear properties of gold nanoparticles: The influence of the generalized thermal lens in the long laser pulse regime and the hot electron contribution to the gold particle intrinsic third-order susceptibility, including its spectral dispersion and intensity-dependence. Additionally, we demonstrate the possible significant influence of the heat carrier ballistic regime and phonon rarefaction in the cooling dynamics of an embedded gold nanoparticle subsequent to ultrafast pulsed laser excitation.

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Optically Induced Damping of the Surface Plasmon Resonance in Gold Colloids

Cited by 311 publications

References 17 publications

Laser-Induced Shape Changes of Colloidal Gold Nanorods Using Femtosecond and Nanosecond Laser Pulses

Laser-Induced Shape Changes of Colloidal Gold Nanorods Using Femtosecond and Nanosecond Laser Pulses

Plasmonics: Localization and guiding of electromagnetic energy in metal/dielectric structures

Gold nanoparticle assemblies: interplay between thermal effects and optical response

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