Transmission of a Phononic Superlattice Made of Dynamic Materials |
| S. Garusa, W. Sochackia, J. Garusa, J. Rząckib, P. Vizureanuc, d, A.V. Sanduc, e, f
aDepartment of Mechanics and Fundamentals of Machinery Design, Faculty of Mechanical Engineering and Computer Science, Czestochowa University of Technology, Dąbrowskiego 73, 42-201 Częstochowa, Poland bDepartment of Physics, Faculty of Production Engineering and Materials Technology, Czestochowa University of Technology, Dąbrowskiego 73, 42-201 Częstochowa, Poland cFaculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Lasi, Blvd. D. Mangeron 71, 700050, Iaşi, Romania dTechnical Sciences Academy of Romania, Dacia Blvd 26, 030167 Bucharest, Romania eRomanian Inventors Forum, Str. Sf. P. Movila 3, 700089 Iaşi, Romania fAcademy of Romanian Scientists, 54 Splaiul Independentei St., Sect. 5, 050094, Bucharest, Romania |
| Full Text PDF |
| In one-dimensional phononic crystals, as a result of multiple destructive interferences of a mechanical wave, the phononic band gap phenomenon occurs, i.e., the lack of propagation of a wave of a given frequency through the structure due to internal reflections at the layer boundary and destructive interference. In dynamic phononic crystals, the incident monochromatic mechanical wave at the boundary of the media does not propagate according to Fresnel's relations, but is transformed into a wave spectrum, which affects the phononic properties of the examined structures and allows them to be dynamically controlled. The paper analyzes the transmission and influence of the frequency of changes in the properties of the elements of the finite phononic structure described by sinusoidal functions on the propagation of mechanical waves. |
DOI:10.12693/APhysPolA.144.317 topics: bandgap, finite-difference time-domain (FDTD), discrete Fourier transform (DFT), superlattice |