Acoustic blackbody through instability-induced softening
Abstract Perfect wave absorption across all wavelengths is forbidden by the causality principle. Here we demonstrate an approach that circumvents this fundamental limitation in acoustics by coupling unstable components to achieve zero static modulus. Both heuristic model simulations based on differe...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-06-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-025-02166-2 |
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| _version_ | 1850222076992946176 |
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| author | Min Yang Sichao Qu Nicholas Fang Shuyu Chen |
| author_facet | Min Yang Sichao Qu Nicholas Fang Shuyu Chen |
| author_sort | Min Yang |
| collection | DOAJ |
| description | Abstract Perfect wave absorption across all wavelengths is forbidden by the causality principle. Here we demonstrate an approach that circumvents this fundamental limitation in acoustics by coupling unstable components to achieve zero static modulus. Both heuristic model simulations based on different mechanisms (electromagnetic and mechanical) demonstrate the same ultra-broadband absorption exceeding 95% at all wavelengths greater than 114 times the absorber thickness, with simultaneous efficient reciprocal radiation capabilities. Theoretical analyses reveal that, counter-intuitively, this strategy approaches ideal blackbody behavior as thickness approaches zero. These findings indicate that fundamental physical constraints no longer prevent blackbody realization, leaving only material limitations as the remaining challenge. |
| format | Article |
| id | doaj-art-96694e5c14434e90aba3c8ded4ff50eb |
| institution | OA Journals |
| issn | 2399-3650 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj-art-96694e5c14434e90aba3c8ded4ff50eb2025-08-20T02:06:28ZengNature PortfolioCommunications Physics2399-36502025-06-01811910.1038/s42005-025-02166-2Acoustic blackbody through instability-induced softeningMin Yang0Sichao Qu1Nicholas Fang2Shuyu Chen3Acoustic Metamaterials Group, Data Technology HubDepartment of Mechanical Engineering, The University of Hong KongDepartment of Mechanical Engineering, The University of Hong KongAcoustic Metamaterials Group, Data Technology HubAbstract Perfect wave absorption across all wavelengths is forbidden by the causality principle. Here we demonstrate an approach that circumvents this fundamental limitation in acoustics by coupling unstable components to achieve zero static modulus. Both heuristic model simulations based on different mechanisms (electromagnetic and mechanical) demonstrate the same ultra-broadband absorption exceeding 95% at all wavelengths greater than 114 times the absorber thickness, with simultaneous efficient reciprocal radiation capabilities. Theoretical analyses reveal that, counter-intuitively, this strategy approaches ideal blackbody behavior as thickness approaches zero. These findings indicate that fundamental physical constraints no longer prevent blackbody realization, leaving only material limitations as the remaining challenge.https://doi.org/10.1038/s42005-025-02166-2 |
| spellingShingle | Min Yang Sichao Qu Nicholas Fang Shuyu Chen Acoustic blackbody through instability-induced softening Communications Physics |
| title | Acoustic blackbody through instability-induced softening |
| title_full | Acoustic blackbody through instability-induced softening |
| title_fullStr | Acoustic blackbody through instability-induced softening |
| title_full_unstemmed | Acoustic blackbody through instability-induced softening |
| title_short | Acoustic blackbody through instability-induced softening |
| title_sort | acoustic blackbody through instability induced softening |
| url | https://doi.org/10.1038/s42005-025-02166-2 |
| work_keys_str_mv | AT minyang acousticblackbodythroughinstabilityinducedsoftening AT sichaoqu acousticblackbodythroughinstabilityinducedsoftening AT nicholasfang acousticblackbodythroughinstabilityinducedsoftening AT shuyuchen acousticblackbodythroughinstabilityinducedsoftening |