Phononic crystals (PnCs) are artificial structural composites with periodic modulation of elastic parameters, and they are capable of regulating the propagation of sound waves. Devices with different geometric parameters have been made to regulate phonon band structure. However, how to achieve field adjustment of band structure remains a challenge.
Click here for original story, Researchers demonstrate graphene-based nanoelectromechanical periodic array with tunable frequency
Source: Phys.org