Plasmon emission in photoexcited gold nanoparticles

被引：392
作者：
Dulkeith, E
Niedereichholz, T
Klar, TA
Feldmann, J
von Plessen, G
Gittins, DI
Mayya, KS
Caruso, F
机构：
[1] Univ Munich, Photon & Optoelect Grp, Dept Phys, D-80799 Munich, Germany
[2] Univ Munich, CeNS, D-80799 Munich, Germany
[3] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany
[4] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany
来源：
PHYSICAL REVIEW B | 2004年 / 70卷 / 20期
关键词：
D O I：
10.1103/PhysRevB.70.205424
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Light emission at the particle plasmon frequency is observed in optically excited spherical gold nanoparticles. We find a photoluminescence efficiency of 10(-6), which is essentially independent of particle size and four orders of magnitude higher than the efficiencies determined from metal films. Our experimental findings are explained with a process in which excited d-band holes recombine nonradiatively with sp electrons, emitting particle plasmons. These plasmons subsequently radiate, giving rise to the photoluminescence observed in the experiment. We determine the quantum efficiencies involved in this process.
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页码：205424 / 1
页数：4
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