There is a lot going on in Jorge Pedrós last paper: surface acoustic waves (SAWs), dynamic strain, Raman scattering and optical phonons. At the Instituto de Sistemas Optoelectrónicos y Microtecnología, UPM (together with the Paul Drude Institute in Berlin and the State University of Campinas), they’re using SAWs to modulate the properties of graphene. They’ve proven that “SAWs are powerful tools for modulating the optical and vibrational properties of supported graphene by means of the high-frequency localized deformations tailored by the acoustic transducers, which can also be extended to other 2D systems”. Straintronics, as this new technique is called, employs strain to change and modulate different properties of materials.

We did this picture, under the supervision of Jorge Pedrós, to illustrate their research.