A material generates an electrical signal using light waves that bypasses the physical limits of traditional sensors.
Piezoelectric materials usually create electricity when they are squeezed or stretched, but they can break under too much stress. This new optical phonoelectric effect uses light-driven vibrations instead of mechanical force to create a charge. Because it relies on phonons rather than physical strain, it can produce signals at the speed of light. It avoids the fracture points that usually destroy high-speed sensors over time. This discovery allows for the creation of incredibly fast electronics that never wear out from physical movement.
The optical phonoelectric effect
arXiv · 2604.27524
Piezoelectricity is a technologically important property of certain insulators in which mechanical strain induces an electrical polarization. However, the rate at which a piezoelectric response can be established over a macroscopic volume is limited by the sound velocity, constraining applications in high-bit-rate transduction and sensing. Furthermore, the strength of the piezoelectric effect is not readily tunable, as it depends on intrinsic anharmonic coupling between strain and intra-unit-cel