دورية أكاديمية
On the effects of suitably designed space microstructures in the propagation of waves in time modulated composites
| العنوان: | On the effects of suitably designed space microstructures in the propagation of waves in time modulated composites |
|---|---|
| المؤلفون: | O. Mattei, V. Gulizzi |
| المساهمون: | O. Mattei, V. Gulizzi |
| بيانات النشر: | American Institute of Physics Inc. |
| سنة النشر: | 2023 |
| المجموعة: | IRIS Università degli Studi di Palermo |
| مصطلحات موضوعية: | wave propagation, space-time modulation, microstructures, Settore ING-IND/06 - Fluidodinamica |
| الوصف: | In the one-dimensional case, the amplitude of a pulse that propagates in a homogeneous material whose properties are instantaneously changed in time will undergo an exponential increase due to the interference between the reflected and transmitted pulses generated at each sudden switch. Here, we resolve the issue by designing suitable reciprocal PT-symmetric space-time microstructures so that the interference between the scattered waves is such that the overall amplitude of the wave will be constant in time in each constituent material. Remarkably, for the geometries proposed here, a pulse will propagate with constant amplitude regardless of the impedance between the constituent materials, and for some, regardless of the wave speed mismatch. We extend, then, these results to the two-dimensional case, by proposing suitable geometries that avoid the blow up of the wave amplitude at the source point due to the scattering associated with time modulation. Given that the energy associated with the wave will increase exponentially in time, this creates the possibility to exploit the stable propagation of the pulse to accumulate energy for harvesting. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000932537200001; volume:122; issue:6; numberofpages:8; journal:APPLIED PHYSICS LETTERS; https://hdl.handle.net/10447/583351Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85148294231; https://arxiv.org/pdf/2211.13017.pdfTest |
| DOI: | 10.1063/5.0132899 |
| الإتاحة: | https://doi.org/10.1063/5.0132899Test https://hdl.handle.net/10447/583351Test https://arxiv.org/pdf/2211.13017.pdfTest |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.A666C5DC |
| قاعدة البيانات: | BASE |
| DOI: | 10.1063/5.0132899 |
|---|