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Modulation of acoustic self-accelerating beams with tunable curved metasurfaces.
- Source :
- Applied Physics Letters; 1/14/2021, Vol. 118 Issue 2, p1-5, 5p
- Publication Year :
- 2021
-
Abstract
- Self-accelerating beams have applications in optic and acoustic fields due to their peculiar properties. As a promising artificial two-dimensional metamaterial, a metasurface can be used as the generator of self-accelerating beams. However, restricted by the generalized Snell's law, most research hotspots focus on flat metasurfaces. In this Letter, the generalized Snell's law on an arbitrary curved reflective surface is discussed. Then, the phase profile for the self-accelerating beams generated from the curved reflective surface is derived based on the caustic theory. The metasurface consisting of the tunable spiral path units is constructed, and numerical and experimental validations are performed. The methodology developed in the present letter extends the applications of the self-accelerating beams. [ABSTRACT FROM AUTHOR]
- Subjects :
- CURVED beams
CURVED surfaces
ACOUSTIC field
GAUSSIAN beams
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 118
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 148105736
- Full Text :
- https://doi.org/10.1063/5.0035286