In one minute

H. Zheng, L. F. Wei, H. Wen and F. Y. Li propose searching for high-frequency gravitational waves through the electromagnetic signals they create in a strong alternating magnetic field. LIGO and Virgo detect lower-frequency waves by their mechanical, tidal effects. In the original Gertsenshtein–Zeldovich setup the signal scales with the square of the wave amplitude, but here it scales linearly, making it detectable with current weak-light detectors. Because the induced signals have a wave impedance very different from ordinary radiation, background noise can be filtered out by wave matching. Tuning the field frequency could let the scheme sweep a wide band, such as 10^7 to 10^12 Hz, if the cavity and sweep are achievable.

Electromagnetic response of gravitational waves passing through an alternating magnetic field