Jiu Hui Wu

1 Introduction Phonons represent the quantized excitations of elastic waves in solids and acoustic waves in liquids. Owing to their wavelengths comparable to those of electromagnetic waves and frequencies compatible with electronic circuits, photons and phonons can be effectively coupled within integrated circuits [1-4].

Abstract Acoustic vortices (AVs) carry orbital angular momentum (OAM), showing great promise in advancing communication, biomedicine, and metrology. An ideal OAM generation method that realizes the tunability of AV topological charge and working frequency in a compact way is strongly desired. Here, we utilize aerodynamic dipole sources from a rotating disk to generate AV.