Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate

V. L. Zhang, C. G. Hou, H. H. Pan, F. S. Ma, M. H. Kuok, H. S. Lim, S. C. Ng, M. G. Cottam, M. Jamali, H. Yang

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Brillouin measurements of the dispersion relations of surface acoustic- and optical-like waves along Γ-M and Γ-X symmetry directions in a two-dimensional bicomponent nanostructured crystal are reported. The sample, in the form of a periodic chessboard array of alternating Permalloy and cobalt square dots on a SiO 2/Si substrate, was fabricated using high-resolution electron-beam lithographic, sputtering, etching, and lift-off techniques. The measured phononic band structures exhibit diverse features, such as a partial hybridization bandgap and unusual surface optical-like phonon branches, where there are out-of-phase vibrational characteristics between nearest-neighbor dots. Numerical simulations, based on the finite element analysis, reproduced the experimental dispersion relations.

Original languageEnglish (US)
Article number053102
JournalApplied Physics Letters
Volume101
Issue number5
DOIs
StatePublished - Jul 30 2012

Fingerprint Dive into the research topics of 'Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate'. Together they form a unique fingerprint.

  • Cite this

    Zhang, V. L., Hou, C. G., Pan, H. H., Ma, F. S., Kuok, M. H., Lim, H. S., Ng, S. C., Cottam, M. G., Jamali, M., & Yang, H. (2012). Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate. Applied Physics Letters, 101(5), [053102]. https://doi.org/10.1063/1.4739950