2014/06/13 by Kun Tang, Chunyin Qiu, Tang, Kun +9
Engineering · Health Professions · Materials Science · #Acoustic Wave Phenomena Research #FOS: Physical sciences #Metamaterials and Metasurfaces Applications #Noise Effects and Management #Other Condensed Matter (cond-mat.other)
paper · pdf · doi:10.48550/arxiv.1406.3552
openalex publication_date 2014/06/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. The experimental results are in excellent agreement with the theoretical predictions. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.