Researchers have developed a novel experimental platform to measure the electric fields of light trapped between two mirrors with a sub-cycle precision.

These electro-optic Fabry-Pérot resonators will allow for precise control and observation of light-matter interactions, particularly in the terahertz (THz) spectral range. The study is published in the journal Light: Science & Applications.

The researchers are from the Department of Physical Chemistry at the Fritz Haber Institute of the Max Planck Society and the Institute of Radiation Physics at Helmholtz Center Dresden-Rossendorf.