Surface collective excitations in ultrafast pump-probe spectroscopy of metal nanoparticles

被引：22

作者：

Shahbazyan, TV ^{[1
]}

Perakis, IE ^{[1
]}

机构：

[1] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA

来源：

CHEMICAL PHYSICS | 2000年 / 251卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0301-0104(99)00311-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of surface collective excitations in the electron relaxation in small metal particles is studied. It is shown that the dynamically screened electron-electron interaction in a nanoparticle contains a size-dependent correction induced by the surface. This leads to new channels of quasiparticle scattering accompanied by the emission of surface collective excitations. In noble-metal particles, the dipole collective excitations (surface plasmons) mediate a resonant scattering of d-holes to the conduction band. The role of this effect in the ultrafast optical dynamics of small nanoparticles is studied. With decreasing nanoparticle size, it leads to a drastic change in the differential absorption lineshape and a strong frequency dependence of the relaxation near the surface plasmon resonance. The experimental implications of these results in ultrafast pump-probe spectroscopy are addressed. We also discuss the size-dependence of conduction electron scattering rates. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：37 / 49

页数：13

共 45 条

[21] Surface-plasmon resonances in single metallic nanoparticles [J].

Klar, T ;

Perner, M ;

Grosse, S ;

von Plessen, G ;

Spirkl, W ;

Feldmann, J .

PHYSICAL REVIEW LETTERS, 1998, 80 (19) :4249-4252

[22] Coherence of four-particle correlations in semiconductors [J].

Kner, P ;

Schäfer, W ;

Lövenich, R ;

Chemla, DS .

PHYSICAL REVIEW LETTERS, 1998, 81 (24) :5386-5389

[23]

Kreibig U., 1995, OPTICAL PROPERTIES M

[24]

Krezin V. V., 1995, PHYS REV B, V51, P1844

[25]

KREZIN VV, 1992, PHYS REP, V220, P1

[26] SURFACE-PLASMON DISPERSION AND SIZE DEPENDENCE OF MIE RESONANCE - SILVER VERSUS SIMPLE METALS [J].

LIEBSCH, A .

PHYSICAL REVIEW B, 1993, 48 (15) :11317-11328

[27] SURFACE PLASMONS IN SMALL METAL PARTICLES [J].

LUSHNIKOV, AA ;

SIMONOV, AJ .

ZEITSCHRIFT FUR PHYSIK, 1974, 270 (01) :17-24

[28]

MAHAN GD, 1990, MANY PARTICLE PHYSIC

[29] Ultrafast electronic dynamics in solid and liquid gallium nanoparticles [J].

Nisoli, M ;

Stagira, S ;

DeSilvestri, S ;

Stella, A ;

Tognini, P ;

Cheyssac, P ;

Kofman, R .

PHYSICAL REVIEW LETTERS, 1997, 78 (18) :3575-3578

[30] Hot-electron dynamics at Cu(100), Cu(110), and Cu(111) surfaces: Comparison of experiment with Fermi-liquid theory [J].

Ogawa, S ;

Nagano, H ;

Petek, H .

PHYSICAL REVIEW B, 1997, 55 (16) :10869-10877

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