High-frequency surface acoustic wave propagation in nanostructures characterized by coherent extreme ultraviolet beams

被引：55

作者：

Siemens, Mark E. ^{[1
,5
]}

Li, Qing ^{[1
,5
]}

Murnane, Margaret M. ^{[1
,5
]}

Kapteyn, Henry C. ^{[1
,5
]}

Yang, Ronggui ^{[4
]}

Anderson, Erik H. ^{[3
]}

Nelson, Keith A. ^{[2
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA

[4] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[5] Univ Colorado, JILA, Boulder, CO 80309 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 09期

关键词：

acoustic dispersion; acoustic wave propagation; acousto-optical effects; nanostructured materials; nickel; sapphire; surface acoustic waves;

D O I：

10.1063/1.3090032

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study ultrahigh frequency surface acoustic wave propagation in nickel-on-sapphire nanostructures. The use of ultrafast, coherent, extreme ultraviolet beams allows us to extend optical measurements of propagation dynamics of surface acoustic waves to frequencies of nearly 50 GHz, corresponding to wavelengths as short as 125 nm. We repeat the measurement on a sequence of nanostructured samples to observe surface acoustic wave dispersion in a nanostructure series. These measurements are critical for accurate characterization of interfaces beneath very thin films using this technique.

引用

页数：3

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