Flat acoustics with soft gradient-index metasurfaces
Here, the authors report an approach for creating various acoustic wavefronts in free space by using soft gradient-index porous metasurfaces. These flat lenses generate steered planar, focused spherical and helical ultrasonic beams in water by manipulating the spatial distribution of the material po...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2019-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-018-07990-5 |