All-pass phase shifting achieved by acoustic unidirectional guided resonances

All-pass phase shifting achieved by acoustic unidirectional guided resonances

Phase manipulation of sound is an important function for many acoustic applications. Here, we apply temporal coupled mode theory to demonstrate that sound all-pass phase shifting, which means that acoustic waves propagate with unit amplitude but have strong phase changes, can be achieved by utilizin...

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Veröffentlicht in:Applied physics express 2024-01, Vol.17 (1), p.14002
Hauptverfasser: Li, Heyi, Miao, Wenjie, Du, Qiujiao, Peng, Pai, Liu, Fengming
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acoustic unidirectional guided resonances (AUGRs)
all-pass phase shifting (APS)
temporal coupled mode theory (TCMT)
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container_title Applied physics express
container_volume 17
creator Li, Heyi
Miao, Wenjie
Du, Qiujiao
Peng, Pai
Liu, Fengming
description Phase manipulation of sound is an important function for many acoustic applications. Here, we apply temporal coupled mode theory to demonstrate that sound all-pass phase shifting, which means that acoustic waves propagate with unit amplitude but have strong phase changes, can be achieved by utilizing acoustic unidirectional guided resonances (AUGRs). An oblique layered acoustic structure with inversion-symmetry is proposed to realize AUGRs that radiate only to one side of the structure. Full-wave simulations are employed to validate the theoretical analysis. With the strong phase-only resonances, our proposed acoustic structure can find applications in acoustic filtering and sensing.
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subjects acoustic unidirectional guided resonances (AUGRs)
all-pass phase shifting (APS)
temporal coupled mode theory (TCMT)
title All-pass phase shifting achieved by acoustic unidirectional guided resonances
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