Direct observation of a hypersonic band gap in two-dimensional single crystalline phononic structures

被引：45

作者：

Gorishnyy, Taras ^{[1
]}

Jang, Ji-Hyun ^{[1
]}

Koh, CheongYang ^{[1
]}

Thomas, Edwin L. ^{[1
]}

机构：

[1] MIT, Inst Soldier Nanotechnol, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2786605

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Brillouin light scattering is employed to record the phonon dispersion relation of two-dimensional (2D) hypersonic phononic crystals with square lattice plane group p4mm symmetry. The samples are single crystalline arrays of cylindrical holes with a lattice constant of 750 nm and 35% porosity patterned in epoxy using interference lithography. The dispersion relation reveals the presence of a phononic band gap between 1.21 and 1.57 GHz at the edge of the first Brillouin zone for elastic waves propagating along the [10] direction and conclusively demonstrates a band gap in a single crystalline 2D polymer based phononic structure at hypersonic frequencies.

引用

页数：3

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