Acoustic surface waves on three-dimensional groove gratings with sub-wavelength thickness. (23rd July 2018)

• Record Type: Journal Article
• Authors: Cao, Wen Kang; Wu, Li Ting; Zhang, Cheng; Song, Gang Yong; Ke, Jun Chen; Cheng, Qiang; Cui, Tie Jun
• Is Part Of: Applied physics express. Volume 11:Number 8(2018)
• Publication Date: 2018-07-23
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.11.087301
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: Spoof surface acoustic waves (SSAWs) can be tightly confined at the subwavelength scale by groove gratings and propagate along the surface with low loss in a broad bandwidth. Here, we put forward a three-dimensional SSAW waveguide with a compact cross section perpendicular to the propagation direction. By introducing an additional transition part for mode conversion, the proposed SSAW waveguide can guide surface modes in a wide frequency range under the excitation of a point source. Both numerical and experimental results confirm the validity of the proposed design, thus offering attractive prospects for acoustic surface wave applications.