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|Title:||Phononic dispersion of a two-dimensional chessboard-patterned bicomponent array on a substrate|
|Authors:||Zhang, V.L. |
|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. https://doi.org/10.1063/1.4739950|
|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|
|Appears in Collections:||Staff Publications|
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