Hypersonic Phononic Crystals

T. Gorishnyy, C. K. Ullal, M. Maldovan, G. Fytas, and E. L. Thomas
Phys. Rev. Lett. 94, 115501 – Published 22 March 2005

Abstract

In this Letter we propose the use of hypersonic phononic crystals to control the emission and propagation of high frequency phonons. We report the fabrication of high quality, single crystalline hypersonic crystals using interference lithography and show that direct measurement of their phononic band structure is possible with Brillouin light scattering. Numerical calculations are employed to explain the nature of the observed propagation modes. This work lays the foundation for experimental studies of hypersonic crystals and, more generally, phonon-dependent processes in nanostructures.

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  • Received 8 October 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.115501

©2005 American Physical Society

Authors & Affiliations

T. Gorishnyy1,*, C. K. Ullal1, M. Maldovan1,2, G. Fytas3,4, and E. L. Thomas1,2

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 2Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 3Max Planck Institute for Polymer Research, P.O. 3148, 55128 Mainz, Germany
  • 4Department of Materials Science and Technology, University of Crete, and FORTH, P.O. 1527, 71110 Heraklion, Greece

  • *Electronic address: taras@mit.edu

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Vol. 94, Iss. 11 — 25 March 2005

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