Broadband reflected wavefronts manipulation using structured phase gradient metasurfaces
Xiao-Peng Wang,
Le-Le Wan,
Tian-Ning Chen,
Ai-Ling Song,
Xiao-Wen Du
Affiliations
Xiao-Peng Wang
School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an 710049, People’s Republic of China
Le-Le Wan
School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an 710049, People’s Republic of China
Tian-Ning Chen
School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an 710049, People’s Republic of China
Ai-Ling Song
School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an 710049, People’s Republic of China
Xiao-Wen Du
School of Mechanical Engineering and State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an 710049, People’s Republic of China
Acoustic metasurface (AMS) is a good candidate to manipulate acoustic waves due to special acoustic performs that cannot be realized by traditional materials. In this paper, we design the AMS by using circular-holed cubic arrays. The advantages of our AMS are easy assemble, subwavelength thickness, and low energy loss for manipulating acoustic waves. According to the generalized Snell’s law, acoustic waves can be manipulated arbitrarily by using AMS with different phase gradients. By selecting suitable hole diameter of circular-holed cube (CHC), some interesting phenomena are demonstrated by our simulations based on finite element method, such as the conversion of incoming waves into surface waves, anomalous reflections (including negative reflection), acoustic focusing lens, and acoustic carpet cloak. Our results can provide a simple approach to design AMSes and use them in wavefront manipulation and manufacturing of acoustic devices.
