Tunable unidirectional compact acoustic amplifier via space-time modulated membranes

Xiaohui Zhu; Junfei Li; Chen Shen; Guangyu Zhang; Steven A. Cummer; Longqiu Li

doi:10.1103/PhysRevB.102.024309

Tunable unidirectional compact acoustic amplifier via space-time modulated membranes

Xiaohui Zhu, Junfei Li, Chen Shen, Guangyu Zhang, Steven A. Cummer, Longqiu Li

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Space-time modulation has recently attracted considerable attention as it enables new possibilities in wave manipulation and control. Here we propose a tunable unidirectional acoustic amplifier based on a space-time modulated membrane system. The transfer matrix method is applied to design this system and optimize the modulation parameters for the realization of unidirectional amplification. Efficient one-way amplification of acoustic waves is demonstrated theoretically and numerically within a frequency range from 2260 to 2520 Hz, with overall dimension being less than 1/3 of the corresponding wavelength. Across this operation band, the amplification factor in the positive direction varies smoothly from 3.0 to 5.8, while the transmitted wave energy in the negative direction does not change significantly. Our work identifies a feasible approach to realize a tunable unidirectional acoustic amplifier via space-time modulated membranes, which offers a design platform for a number of applications in sensing, imaging, and communication.

Original language	English (US)
Article number	024309
Journal	Physical Review B
Volume	102
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.102.024309
State	Published - Jul 1 2020
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.102.024309

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title = "Tunable unidirectional compact acoustic amplifier via space-time modulated membranes",

abstract = "Space-time modulation has recently attracted considerable attention as it enables new possibilities in wave manipulation and control. Here we propose a tunable unidirectional acoustic amplifier based on a space-time modulated membrane system. The transfer matrix method is applied to design this system and optimize the modulation parameters for the realization of unidirectional amplification. Efficient one-way amplification of acoustic waves is demonstrated theoretically and numerically within a frequency range from 2260 to 2520 Hz, with overall dimension being less than 1/3 of the corresponding wavelength. Across this operation band, the amplification factor in the positive direction varies smoothly from 3.0 to 5.8, while the transmitted wave energy in the negative direction does not change significantly. Our work identifies a feasible approach to realize a tunable unidirectional acoustic amplifier via space-time modulated membranes, which offers a design platform for a number of applications in sensing, imaging, and communication.",

author = "Xiaohui Zhu and Junfei Li and Chen Shen and Guangyu Zhang and Cummer, {Steven A.} and Longqiu Li",

note = "Funding Information: J.L., C.S., and S.A.C. wish to thank a Multidisciplinary University Research Initiative grant from the Office of Naval Research (Grant No. N00014-13-1-0631) and an Emerging Frontiers in Research and Innovation grant from the National Science Foundation (Grant No. 1641084). X.Z., G.Z., and L.L. wish to thank the National Natural Science Foundation of China (No. 51975142), the Natural Science Foundation of Heilongjiang Province (No. E2017036), and the Assisted Project by Heilongjiang Postdoctoral Funds for Scientific Research Initiation. X.Z. wishes to acknowledge the China Scholarship Council (CSC) for financial support. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",

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doi = "10.1103/PhysRevB.102.024309",

language = "English (US)",

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T1 - Tunable unidirectional compact acoustic amplifier via space-time modulated membranes

AU - Zhu, Xiaohui

AU - Li, Junfei

AU - Shen, Chen

AU - Zhang, Guangyu

AU - Cummer, Steven A.

AU - Li, Longqiu

N1 - Funding Information: J.L., C.S., and S.A.C. wish to thank a Multidisciplinary University Research Initiative grant from the Office of Naval Research (Grant No. N00014-13-1-0631) and an Emerging Frontiers in Research and Innovation grant from the National Science Foundation (Grant No. 1641084). X.Z., G.Z., and L.L. wish to thank the National Natural Science Foundation of China (No. 51975142), the Natural Science Foundation of Heilongjiang Province (No. E2017036), and the Assisted Project by Heilongjiang Postdoctoral Funds for Scientific Research Initiation. X.Z. wishes to acknowledge the China Scholarship Council (CSC) for financial support. Publisher Copyright: © 2020 American Physical Society.

PY - 2020/7/1

Y1 - 2020/7/1

N2 - Space-time modulation has recently attracted considerable attention as it enables new possibilities in wave manipulation and control. Here we propose a tunable unidirectional acoustic amplifier based on a space-time modulated membrane system. The transfer matrix method is applied to design this system and optimize the modulation parameters for the realization of unidirectional amplification. Efficient one-way amplification of acoustic waves is demonstrated theoretically and numerically within a frequency range from 2260 to 2520 Hz, with overall dimension being less than 1/3 of the corresponding wavelength. Across this operation band, the amplification factor in the positive direction varies smoothly from 3.0 to 5.8, while the transmitted wave energy in the negative direction does not change significantly. Our work identifies a feasible approach to realize a tunable unidirectional acoustic amplifier via space-time modulated membranes, which offers a design platform for a number of applications in sensing, imaging, and communication.

AB - Space-time modulation has recently attracted considerable attention as it enables new possibilities in wave manipulation and control. Here we propose a tunable unidirectional acoustic amplifier based on a space-time modulated membrane system. The transfer matrix method is applied to design this system and optimize the modulation parameters for the realization of unidirectional amplification. Efficient one-way amplification of acoustic waves is demonstrated theoretically and numerically within a frequency range from 2260 to 2520 Hz, with overall dimension being less than 1/3 of the corresponding wavelength. Across this operation band, the amplification factor in the positive direction varies smoothly from 3.0 to 5.8, while the transmitted wave energy in the negative direction does not change significantly. Our work identifies a feasible approach to realize a tunable unidirectional acoustic amplifier via space-time modulated membranes, which offers a design platform for a number of applications in sensing, imaging, and communication.

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Tunable unidirectional compact acoustic amplifier via space-time modulated membranes

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