Interface nano-confined acoustic waves in polymeric surface phononic crystals

被引：27

作者：

Travagliati, Marco ^{[1
,2
,3
]}

Nardi, Damiano ^{[4
,5
]}

Giannetti, Claudio ^{[6
,7
]}

Gusev, Vitalyi ^{[8
]}

Pingue, Pasqualantonio ^{[2
,3
]}

Piazza, Vincenzo ^{[1
]}

Ferrini, Gabriele ^{[6
,7
]}

Banfi, Francesco ^{[6
,7
]}

机构：

[1] Ist Italiano Tecnol, Ctr Nanotechnol Innovat NEST, I-56127 Pisa, Italy

[2] Scuola Normale Super Pisa, NEST, I-56127 Pisa, Italy

[3] CNR, Ist Nanosci, I-56127 Pisa, Italy

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

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

[6] Univ Cattolica Sacro Cuore, I LAMP, I-25121 Brescia, Italy

[7] Univ Cattolica Sacro Cuore, Dipartimento Matemat & Fis, I-25121 Brescia, Italy

[8] Univ Maine, UMR CNRS 6613, LAUM, F-72085 Le Mans, France

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 02期

关键词：

D O I：

10.1063/1.4905850

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The impulsive acoustic dynamics of soft polymeric surface phononic crystals is investigated here in the hypersonic frequency range by near-IR time-resolved optical diffraction. The acoustic response is analysed by means of wavelet spectral methods and finite element modeling. An unprecedented class of acoustic modes propagating within the polymer surface phononic crystal and confined within 100 nm of the nano-patterned interface is revealed. The present finding opens the path to an alternative paradigm for characterizing the mechanical properties of soft polymers at interfaces and for sensing schemes exploiting polymers as embedding materials. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

引用

页数：5

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