Surface corrugated laminates as elastic grating couplers: Splitting of SV- and P-waves by selective diffraction
| Autor: | Gregory J. Chaplain, Richard V. Craster |
|---|---|
| Přispěvatelé: | UKRI, Engineering & Physical Science Research Council (E, EU COMMISSION |
| Rok vydání: | 2021 |
| Předmět: |
Surface (mathematics)
Diffraction Materials science Body waves Transfer-matrix method (optics) Scalar (mathematics) General Physics and Astronomy FOS: Physical sciences Physics::Optics 02 engineering and technology Applied Physics (physics.app-ph) Grating 01 natural sciences 09 Engineering Physics Applied Optics Negative refraction 0103 physical sciences 01 Mathematical Sciences Applied Physics 010302 applied physics Science & Technology 02 Physical Sciences business.industry Physics Physics - Applied Physics 021001 nanoscience & nanotechnology Crystal momentum Physical Sciences 0210 nano-technology business physics.app-ph |
| Zdroj: | Journal of Applied Physics |
| ISSN: | 0021-8979 |
| DOI: | 10.1063/5.0037804 |
| Popis: | The phenomenon of selective diffraction is extended to in-plane elastic waves and we design surface corrugated periodic laminates that incorporate crystal momentum transfer which, due to the rich physics embedded within the vector elastic system, results in frequency, angle and wave-type selective diffraction. The resulting devices are elastic grating couplers, with additional capabilities as compared to analogous scalar electromagnetic couplers, in that the elastic couplers possess the ability to split and independently redirect, through selective negative refraction, the two body waves present in the vector elastic system: compressional (P) and shear-vertical (SV) elastic waves. The design paradigm, and interpretation, is aided by obtaining isofrequency contours via a non-dimensionalised transfer matrix method. Comment: 9 pages, 5 figures |
| Databáze: | OpenAIRE |
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