Dr Eddie Lau's Article Chosen as Editor’s Pick in the Journal of Applied Physics
AUTHOR
Xing-Feng Zhu and Siu-Kit Lau
Dr Eddie Lau’s article, “Perfect Anomalous Reflection and Refraction with Binary Acoustic Metasurfaces,” was published online in the Journal of Applied Physics (Vol.126, Issue 22).
Abstract:
Binary acoustic metasurfaces (AMs) are proposed and demonstrated with the goal of perfect anomalous reflection and refraction. The AMs require only two sub-units per period, thereby improving greatly the fabrication accuracy and reducing the design process. Theoretical analysis gives the range of incident and diffracted angles for the case of only two propagating modes, one of which can be suppressed by designing the two sub-units to have opposite phases, thereby achieving perfect anomalous reflection/refraction. Moreover, the reflection- and refraction-type binary AMs are realized using two types of space-coiling structure. Finite-element simulations show the realization of anomalous reflection and refraction, the energy efficiencies of which can reach almost 100%. The present work provides a simple and straightforward way to design high-efficiency and practical AMs that enable nearly ideal manipulation of reflected/transmitted waves.
The article may be accessed via this link.
