Bubble-type coding metasurfaces for broadband deep subwavelength underwater acoustic manipulations
Ping Han, Zhandong Huang, Hao‐Wen Dong, Shengdong Zhao
Abstract
Abstract We construct a reflective broadband acoustic coding metasurface using bubbles as the unit. The reflected phase difference between the cube bubble unit and the pure water unit is about π over a wide frequency range. The broadband phenomenon could be explained by the reflection theory between the soft water–air interface and the hard water–rigid interface. Its relative bandwidth reaches 187%, close to 200% of the theoretical limit. By reconstructing the 0/1 sequence, we performed numerical simulation on broadband acoustic focusing and diffusing reflection. The research in this work has potential applications in improving the performance of underwater communication and cloaking.
Topics & Concepts
BroadbandUnderwaterBubbleAcousticsCloakingBandwidth (computing)Reflection (computer programming)OpticsCoding (social sciences)Computer sciencePhysicsMetamaterialTelecommunicationsGeologyMathematicsProgramming languageStatisticsOceanographyParallel computingAcoustic Wave Phenomena ResearchMetamaterials and Metasurfaces ApplicationsUnderwater Acoustics Research