Near-IR vibrational dynamics of periodic gold single and pair nanocuboids

被引：19
|
作者：
Wang, Li [2 ]
Nishijima, Yoshiaki [1 ]
Ueno, Kosei [1 ]
Misawa, Hiroaki [1 ]
Tamai, Naoto [2 ]
机构：
[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010021, Japan
[2] Kwansei Gakuin Univ, Sch Sci & Technol, Dept Chem, Sanda, Hyogo 6691337, Japan
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 05期
关键词：
finite difference time-domain analysis; gold; infrared spectra; nanostructured materials; phonons; NANOPARTICLE PAIRS; OPTICAL-PROPERTIES; PARTICLE PAIRS; PLASMON; OSCILLATION; EXCITATION; NANORODS;
D O I：
10.1063/1.3202403
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We examined vibrational dynamics of periodic gold single and pair nanocuboids with 9 nm separation at 400 nm excitation by near-IR transient absorption spectroscopy. The similar oscillation periods of coherent phonon vibration (77 +/- 1 ps) were observed for both nanocuboids while the damping of the pair was faster than that of the single. From the analysis of bleaching peak shift and finite-difference time-domain calculation, the lattice change in coherent phonon vibration was estimated to be +/- 1% for a quasiextensional and +/- 3% for an quasibreathing modes of a single nanocuboid.
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页数：3
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