Time-delay Gradient and Reflections on Corrugated Surfaces

• Main Authors: Georgina Alejandra Lizaso, Nicolás Casais Dassie, Damián Andrés Fernández, Jorge Petrosino
• Format: Article
• Language: English
• Published: Universidad de Buenos Aires 2019-06-01
• Series: Revista Elektrón
• Subjects: metasuperficies acústicas; control de reflexión; reflexión sin dispersión.
• Online Access: http://elektron.fi.uba.ar/index.php/elektron/article/view/73
• ISSN: 2525-0159

Acoustic wave reflections from corrugated surfaces are analyzed. For this work, a proposal of Yi-Fan Zhu on a relatively simple model of metasurface is taken as a basis. Each groove of a corrugated surface can be considered analogous to a linear array, while the depth of its grooves is related to the phase of each source. Zhu's original proposal takes the phase gradient of the arrangement as a design parameter. In this paper we analyze the advantages of surface design from the time-delay gradient. It also presents the possibility of impose brief delays in the whole pattern of reflections independently of the general design process.