TY - GEN
T1 - Surface acoustic wave band gaps and phononic structures on thin solid plates
AU - Zhang, Xinya
AU - Jackson, Ted
AU - Lafond, Emmanuel
AU - Deymier, Pierre
AU - Vasseur, Jerome
PY - 2005
Y1 - 2005
N2 - Novel phononic crystal structures on thin plates for material science applications in ultrasonic range (∼ MHz) are described. Phononic crystals are created by a periodic arrangement of two or more materials displaying a strong contrast in their elastic properties and density. Because of the artificial periodic elastic structures of phononic crystals, there can exist frequency ranges in which waves cannot propagate, giving rise to phononic band gaps which are analogous to photonic band gaps for electromagnetic waves in the welldocumented photonic crystals. In the past decades, the phononic structures and acoustic band gaps based on bulk materials have been researched in length. However few investigations have been performed on phononic structures on thin plates to form surface acoustic wave band gaps. In this presentation, we report a new approach: patterning two dimensional membranes to form phononic crystals, searching for specific acoustic transport properties and surface acoustic waves band gaps through a series of deliberate designs and experimental characterizations. The proposed phononic crystals are numerically simulated through a three-dimensional plane wave expansion (PWE) method and experimentally characterized by a laser ultrasonics instrument that has been developed in our laboratory.
AB - Novel phononic crystal structures on thin plates for material science applications in ultrasonic range (∼ MHz) are described. Phononic crystals are created by a periodic arrangement of two or more materials displaying a strong contrast in their elastic properties and density. Because of the artificial periodic elastic structures of phononic crystals, there can exist frequency ranges in which waves cannot propagate, giving rise to phononic band gaps which are analogous to photonic band gaps for electromagnetic waves in the welldocumented photonic crystals. In the past decades, the phononic structures and acoustic band gaps based on bulk materials have been researched in length. However few investigations have been performed on phononic structures on thin plates to form surface acoustic wave band gaps. In this presentation, we report a new approach: patterning two dimensional membranes to form phononic crystals, searching for specific acoustic transport properties and surface acoustic waves band gaps through a series of deliberate designs and experimental characterizations. The proposed phononic crystals are numerically simulated through a three-dimensional plane wave expansion (PWE) method and experimentally characterized by a laser ultrasonics instrument that has been developed in our laboratory.
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U2 - 10.1115/IMECE2005-81029
DO - 10.1115/IMECE2005-81029
M3 - Conference contribution
AN - SCOPUS:33645973224
SN - 0791842258
SN - 9780791842256
T3 - American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCA
SP - 155
EP - 162
BT - American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCA
T2 - 2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005
Y2 - 5 November 2005 through 11 November 2005
ER -