Phonon-assisted free-electron recoil control and mechanical sensing
Using vibrating membranes to steer and sense with electron beams
Researchers showed theoretically that a vibrating membrane can control how free electrons scatter light and absorb momentum—and in the process, detect tiny external forces better than conventional optical methods. The membrane's motion creates special light patterns that electrons can interact with, encoding force information directly into how the electrons recoil.
This opens a new way to build ultra-sensitive force detectors and reconfigurable electron optics without moving mechanical parts in the electron path itself. Because the approach could outperform existing optical sensing methods, it might enable more precise measurement tools for nanotechnology, quantum systems, or fundamental physics experiments.