Piezoelectricity induced defect modes for shear waves in a periodically stratified supperlattice

Piliposyan, Davit

doi:10.1016/j.jsv.2017.09.026

Cited by 6 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the existence of BGs and defect states, PCs have many potential applications, which can be widely used in acoustic waveguides, portable devices, wireless sensors, and other devices (Jin et al, 2015; Li and Assouar, 2016; Sun et al, 2022; Taleb and Darbari, 2019). PCs waveguides can transmit sound energy or signals within a specific frequency range, which will be limited to a specified path (Ash et al, 2017; Han and Zhang, 2020; Liu et al, 2020; Piliposyan, 2018). In general, the waveguide is achieved by introducing defects into PCs to obtain propagation mode and changing the geometric parameters or material composition of PCs.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable local-resonance elastic waveguides in piezoelectric phononic crystals plate

Sun,

Xu,

et al. 2024

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

A local-resonance piezoelectric phononic crystal consisting of a quadrangular prism piezoelectric scatterer polarized along the z-axis and wrapped by a plexiglass layer is proposed in this work. The short-circuit external electrical boundary condition is selectively added to the upper and lower surfaces of the piezoelectric scatterer to tune the distribution of polarized charges generated by the localized vibration modes. The band structures of the unit cell are calculated using the finite element method, where the upper boundary of the second complete bandgap is replaced by a passband of type of quadrupole local resonance mode. This passband lies entirely in the second bandgap under the open-circuit external electrical condition. The results of the band structures are verified by the transmission loss of the semi-infinite structure in the frequency domain. Two piezoelectric waveguides with complex paths are designed, showing that elastic waves propagate completely along the given waveguide paths at a particular frequency range. The proposed phononic crystals without additional circuit elements can be assembled into waveguides with arbitrary reconfigurable paths, transmitting elastic waves.

show abstract

Section: Introductionmentioning

confidence: 99%

Reconfigurable local-resonance elastic waveguides in piezoelectric phononic crystals plate

Sun,

Xu,

et al. 2024

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

show abstract

“…Ten years later, the predicted phenomenon was experimentally demonstrated by Debye and Sears 2 . Since then, the interaction phenomenon has received increasing attention because of its applications such as modulator 3 , filter 4 , 5 , field reconstruction 6 , 7 , beamformer 8 , and Bragg imaging 9 , 10 , optical pulse storage 11 , optical information conversion 12 , and phonon lasers 13 .…”

Section: Introductionmentioning

confidence: 99%

Enhancement of acousto-optic interaction using a phoxonic cavity with structural hierarchy

An,

Park,

Jeon

2024

Sci Rep

View full text Add to dashboard Cite

We propose a phoxonic cavity with structural hierarchy to enhance acousto-optic interaction in acoustically dissipative media. In a conventional phoxonic cavity, interaction between infrared light and hypersound with the same wavelength scale became weak due to large acoustic attenuation whose coefficient is proportional to the square of the frequency. To alleviate the acoustic attenuation, it is necessary to use low-frequency sound with much longer wavelength than the infrared light, but the conventional phoxonic cavity is not suitable for confining such hypersound and infrared light simultaneously. In this study, we employ the concept of structural hierarchy into the phoxonic cavity to control infrared light and hypersound with different wavelength scales. A phoxonic cavity with two different scales achieves the acousto-optic interaction approximately 1.6 times that in the conventional one. To further enhance the interaction, we adjust geometrical constitution and material properties of the two-scale phoxonic cavity using quasi-static homogenization theory, leading to the interaction about 2.1 times that in the conventional cavity.

show abstract

“…There are two main streams of research: (a) the enhancement of output electrical responses (e.g. current, voltage, and electric power) that are generated by piezoelectric effects [32][33][34]; and (b) the achievement of a high Q-factor in frequency responses of elastic-wave energy transmitted through a PnC [35][36][37]. These topics commonly assume the circumstance where elastic waves are incident toward the PnC.…”

Section: Introductionmentioning

confidence: 99%

Double piezoelectric defects in phononic crystals for ultrasonic transducers

Jo¹,

Lee²,

Yoon³

et al. 2023

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Significant prior research has explored elastic wave-energy localization via a defect mode of a phononic crystal (PnC). The integration of defect-introduced PnCs and piezoelectric materials has paved the path for the development of new conceptual products for applications in energy harvesters, wave filters, and ultrasonic sensors. Recently, an attempt has been made to deviate from this paradigm and design an ultrasonic transducer that generates elastic waves. Unfortunately, the previous works have been limited to a single-defect situation. Therefore, as an advanced approach, this work aims to expand the PnC design space into double defects, which will make the ultrasonic transducer useful at several frequencies. As a first step, this study targets longitudinal wave generation. To predict the wave-generation performance, a previous analytical model that was built for energy-harvesting purposes under a single-defect situation is modified to be suitable for the present wave-generation purpose under a double-defect situation. Moreover, two parametric studies are executed to analyze how the output responses change based on changes to the input voltage setting and the spacing between the double defects. We hope that these ultrasonic transducers can be potentially applicable for nondestructive testing in structural health monitoring and ultrasonic imaging in medical science.

show abstract

Piezoelectricity induced defect modes for shear waves in a periodically stratified supperlattice

Cited by 6 publications

References 28 publications

Reconfigurable local-resonance elastic waveguides in piezoelectric phononic crystals plate

Reconfigurable local-resonance elastic waveguides in piezoelectric phononic crystals plate

Enhancement of acousto-optic interaction using a phoxonic cavity with structural hierarchy

Double piezoelectric defects in phononic crystals for ultrasonic transducers

Contact Info

Product

Resources

About