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.

引用

页数：3

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