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Title: Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate
Authors: 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. 
Issue Date: 30-Jul-2012
Citation: 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. (2012-07-30). Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate. Applied Physics Letters 101 (5) : -. ScholarBank@NUS Repository.
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. © 2012 American Institute of Physics.
Source Title: Applied Physics Letters
ISSN: 00036951
DOI: 10.1063/1.4739950
Appears in Collections:Staff Publications

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