Damping of the localized surface plasmon polariton resonance of gold nanoparticles
Damping of the localized surface plasmon polariton resonance of gold nanoparticles
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DOI：
10.1007/s00340-010-4064-0
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发表时间：
2010-07-01
影响因子：
2.1
通讯作者：
Traeger, F.
中科院分区：
文献类型：
--
作者：
Hubenthal, F.;Hendrich, C.;Traeger, F.
我们报道了金纳米粒子的局域表面等离子体激元共振的强阻尼。在固定光子能量为1.85 eV的条件下，系统地研究了金纳米颗粒中局域表面等离子体激元共振的超快退相时间与颗粒尺寸的关系。从T-2（exp）= 5.5 fs到15.0 fs范围内的退相时间被提取和减少的尺寸的影响进行检测。我们已经确定了两个主要的阻尼机制：众所周知的表面散射，第一次，能带结构的变化。我们已经量化了这些能带结构的变化对光学性质的影响，通过确定的基本阻尼参数A为A（exp）= 0.32 nm/fs。
We report on a strong damping of the localized surface plasmon polariton resonance of gold nanoparticles. The ultra-fast dephasing time of localized surface plasmon polariton resonances in gold nanoparticles was systematically studied as a function of the particle size at a fixed photon energy of hv = 1.85 eV. Dephasing times ranging from T-2(exp) = 5.5 fs to 15.0 fs were extracted and an influence of the reduced dimensions was detected. We have identified two dominant damping mechanisms: the well-known surface scattering and, for the first time, band structure changes. We have quantified the influence of these band structure changes on the optical properties by determining the essential damping parameter A to be A(exp) = 0.32 nm/fs.