Defect-Controlled Hypersound Propagation in Hybrid Superlattices

被引：36

作者：

Schneider, Dirk ^{[1
]}

Liaqat, Faroha ^{[2
]}

El Boudouti, El Houssaine ^{[3
,4
]}

El Abouti, Ossama ^{[3
]}

Tremel, Wolfgang ^{[2
]}

Butt, Hans-Juergen ^{[1
]}

Djafari-Rouhani, Bahram ^{[4
]}

Fytas, George ^{[1
,5
,6
]}

机构：

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

[2] Johannes Gutenberg Univ Mainz, D-55128 Mainz, Germany

[3] Univ Mohamed I, Fac Sci, Dept Phys, LDOM, Oujda 60000, Morocco

[4] Univ Lille 1, UFR Phys, UMR CNRS 8520, Inst Elect Microelect & Nanotechnol, F-59655 Villeneuve Dascq, France

[5] Univ Crete, Dept Mat Sci, Iraklion 71110, Greece

[6] IESL FORTH, Iraklion 71110, Greece

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 16期

关键词：

FOLDED ACOUSTIC PHONONS; RAMAN-SCATTERING; SUPER-LATTICE; SURFACE; MODES; GAP;

D O I：

10.1103/PhysRevLett.111.164301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We employ spontaneous Brillouin light scattering spectroscopy and detailed theoretical calculations to reveal and identify elastic excitations inside the band gap of hypersonic hybrid superlattices. Surface and cavity modes, their strength and anticrossing are unambiguously documented and fully controlled by layer thickness, elasticity, and sequence design. This new soft matter based superlattice platform allows facile engineering of the density of states and opens new pathways to tunable phoxonic crystals.

引用

页数：5

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