Details
| Original language | English |
|---|---|
| Article number | 222203 |
| Journal | Applied physics letters |
| Volume | 122 |
| Issue number | 22 |
| Publication status | Published - 29 May 2023 |
Abstract
Skin effect is one of the intriguing phenomena exhibited by non-Hermitian wave systems. It reflects the localization of the modes at the boundaries of the structure. We demonstrated the skin effect for elastic waves propagating in a non-Hermitian phononic plate containing piezoelectric components in their unit cells. The latter behave as sensors and actuators by using the direct and inverse piezoelectric effects. The demonstration is based on the calculation of the complex non-reciprocal dispersion curves and their analysis for any direction of the wavevector in the two-dimensional space. Therefore, localization phenomena at different boundaries and corners of a finite square structure are presented. Furthermore, by applying different levels of non-Hermiticity in different parts of a square structure, it is shown that the localized features can appear at different positions and with various shapes. These localized phenomena can be reconfigured by acting on the non-Hermiticity parameters. Our results provided a feedback control strategy to introduce the non-Hermitian skin effect in two-dimensional elastic systems for potential applications, such as vibration control, energy harvesting, and sensing.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Applied physics letters, Vol. 122, No. 22, 222203, 29.05.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Reconfigurable localized effects in non-Hermitian phononic plate
AU - Zhong, Wenxin
AU - Cai, Runcheng
AU - Zhuang, Xiaoying
AU - Rabczuk, Timon
AU - Pennec, Yan
AU - Djafari-Rouhani, Bahram
AU - Jin, Yabin
N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (No. 12272267), the Young Elite Scientists Sponsorship Program by CAST (2021QNRC001), the Shanghai Science and Technology Committee (Grant Nos. 22JC1404100 and 21JC1405600), and the Fundamental Research Funds for the Central Universities.
PY - 2023/5/29
Y1 - 2023/5/29
N2 - Skin effect is one of the intriguing phenomena exhibited by non-Hermitian wave systems. It reflects the localization of the modes at the boundaries of the structure. We demonstrated the skin effect for elastic waves propagating in a non-Hermitian phononic plate containing piezoelectric components in their unit cells. The latter behave as sensors and actuators by using the direct and inverse piezoelectric effects. The demonstration is based on the calculation of the complex non-reciprocal dispersion curves and their analysis for any direction of the wavevector in the two-dimensional space. Therefore, localization phenomena at different boundaries and corners of a finite square structure are presented. Furthermore, by applying different levels of non-Hermiticity in different parts of a square structure, it is shown that the localized features can appear at different positions and with various shapes. These localized phenomena can be reconfigured by acting on the non-Hermiticity parameters. Our results provided a feedback control strategy to introduce the non-Hermitian skin effect in two-dimensional elastic systems for potential applications, such as vibration control, energy harvesting, and sensing.
AB - Skin effect is one of the intriguing phenomena exhibited by non-Hermitian wave systems. It reflects the localization of the modes at the boundaries of the structure. We demonstrated the skin effect for elastic waves propagating in a non-Hermitian phononic plate containing piezoelectric components in their unit cells. The latter behave as sensors and actuators by using the direct and inverse piezoelectric effects. The demonstration is based on the calculation of the complex non-reciprocal dispersion curves and their analysis for any direction of the wavevector in the two-dimensional space. Therefore, localization phenomena at different boundaries and corners of a finite square structure are presented. Furthermore, by applying different levels of non-Hermiticity in different parts of a square structure, it is shown that the localized features can appear at different positions and with various shapes. These localized phenomena can be reconfigured by acting on the non-Hermiticity parameters. Our results provided a feedback control strategy to introduce the non-Hermitian skin effect in two-dimensional elastic systems for potential applications, such as vibration control, energy harvesting, and sensing.
UR - http://www.scopus.com/inward/record.url?scp=85161047007&partnerID=8YFLogxK
U2 - 10.1063/5.0152606
DO - 10.1063/5.0152606
M3 - Article
AN - SCOPUS:85161047007
VL - 122
JO - Applied physics letters
JF - Applied physics letters
SN - 0003-6951
IS - 22
M1 - 222203
ER -