One-Dimensional Hypersonic Phononic Crystals

被引：83

作者：

Gomopoulos, N. ^{[1
]}

Maschke, D. ^{[2
]}

Koh, C. Y. ^{[3
]}

Thomas, E. L. ^{[3
]}

Tremel, W. ^{[2
]}

Butt, H. -J. ^{[1
]}

Fytas, G. ^{[1
,4
,5
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Johannes Gutenberg Univ Mainz, Dept Chem, D-55099 Mainz, Germany

[3] MIT, Dept Mat Sci & Engn, Inst Soldier Nanotcchnol, Cambridge, MA 02139 USA

[4] Dept Mat Sci, Iraklion 71110, Greece

[5] FORTH, Iraklion 71110, Greece

来源：

NANO LETTERS | 2010年 / 10卷 / 03期

关键词：

Periodic materials; photonic crystals; dispersion relations; mechanical properties; Brillouin spectroscopy;

D O I：

10.1021/nl903959r

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report experimental observation of a normal incidence phononic band gap in one-dimensional periodic (SiO2/poly(methyl methacrylate)) multilayer him at gigahertz frequencies using Brillouin spectroscopy. The band gap to midgap ratio of 0.30 occurs for elastic wave propagation along the periodicity direction, whereas for inplane propagation the system displays an effective medium behavior. The phononic properties are well captured by numerical simulations. The porosity in the silica layers presents a structural scaffold for the introduction of secondary active media for potential coupling between phonons and other excitations, such as photons and electrons.

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收藏

页码：980 / 984

页数：5

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