TY - JOUR
T1 - Digital programming of reciprocity breaking in resonant piezoelectric metamaterials
AU - Alshaqaq, Mustafa
AU - Sugino, Christopher
AU - Erturk, Alper
N1 - Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
PY - 2023/10
Y1 - 2023/10
N2 - We demonstrate a digitally controlled piezoelectric metamaterial waveguide leveraging resonant, spatiotem-porally modulated synthetic impedance circuits for programmable reciprocity breaking. Piezoelectric metamaterials have effective stiffness that depends on the shunt circuitry connected to each unit cell, offering greatly increased design freedom over their purely mechanical counterparts. By connecting a digitally controlled synthetic impedance shunt circuit to each unit cell of the metamaterial domain, the effective stiffness is externally programmed according to a desired profile in space and time. Specifically, we present threefold capabilities in this electromechanical system: (1) smooth parameter modulation (no abrupt switching) through synthetic impedance circuits that eliminate cumbersome analog electrical components, (2) resonant electromechanical modulation in space and time so that one does not have to operate near the Bragg band gap, and (3) precise digital programming by numerically entering the space and time properties of the domain. We also demonstrate the frequency conversion in narrow-band excitation centered at a directional band gap. The experimental results are compared against high-fidelity multiphysics finite-element simulations, yielding excellent agreement for this class of digitally programmable nonreciprocal elastic metamaterials.
AB - We demonstrate a digitally controlled piezoelectric metamaterial waveguide leveraging resonant, spatiotem-porally modulated synthetic impedance circuits for programmable reciprocity breaking. Piezoelectric metamaterials have effective stiffness that depends on the shunt circuitry connected to each unit cell, offering greatly increased design freedom over their purely mechanical counterparts. By connecting a digitally controlled synthetic impedance shunt circuit to each unit cell of the metamaterial domain, the effective stiffness is externally programmed according to a desired profile in space and time. Specifically, we present threefold capabilities in this electromechanical system: (1) smooth parameter modulation (no abrupt switching) through synthetic impedance circuits that eliminate cumbersome analog electrical components, (2) resonant electromechanical modulation in space and time so that one does not have to operate near the Bragg band gap, and (3) precise digital programming by numerically entering the space and time properties of the domain. We also demonstrate the frequency conversion in narrow-band excitation centered at a directional band gap. The experimental results are compared against high-fidelity multiphysics finite-element simulations, yielding excellent agreement for this class of digitally programmable nonreciprocal elastic metamaterials.
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U2 - 10.1103/PhysRevResearch.5.043003
DO - 10.1103/PhysRevResearch.5.043003
M3 - Article
AN - SCOPUS:85174189921
SN - 2643-1564
VL - 5
JO - Physical Review Research
JF - Physical Review Research
IS - 4
M1 - 043003
ER -