Journal
PHYSICAL REVIEW APPLIED
Volume 7, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.7.024010
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Funding
- National Key Research and Development Program of China [2016YFA0301102]
- National Basic Research Program (973 Program) of China [2012CB921900]
- Natural Science Foundation of China [11574163, 61378006, 11304163]
- Program for New Century Excellent Talents in University [NCET-13-0294]
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We present the design, characterization, and theoretical and experimental demonstration of multiband asymmetric transmission of airborne sound using an ultrathin coded metasurface formed by an alternating arrangement of the coding elements 0 and 1. The asymmetric transmission effect can be easily controlled to selectively achieve off and on by coding different patterns. Both frequency- and angle-selective transmission is discussed. The proposed multiband asymmetric transmission stems from the constructive and destructive interferences of acoustic-wave coupling between the coded elements. The experimental results are in relative agreement with numerical simulations. This work opens an alternative path for ultrathin acoustic-device design and shows promise for application in acoustic rectification and noise control.
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