Defect-controlled hypersound propagation in hybrid superlattices

6533b7d8fe1ef96bd1269aac

RESEARCH PRODUCT

Defect-controlled hypersound propagation in hybrid superlattices

O. El Abouti George Fytas Faroha Liaqat Hans-jürgen Butt Wolfgang Tremel Bahram Djafari-rouhani E. H. El Boudouti Dirk Schneider

subject

[PHYS]Physics [physics]Hypersonic speed Materials science Condensed matter physics Band gap Superlattice General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Layer thickness Brillouin zone 0103 physical sciences Density of states Soft matter Elasticity (economics)010306 general physics 0210 nano-technology

description

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.

year	journal	country	edition	language
2013-01-01

10.1103/physrevlett.111.164301 https://hal.science/hal-00879487/document

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