So far, most gravitational wave (GW) searches have focused on the frequency range from a few hertz to a few kilohertz. In this band, the large ground-based interferometers operated by the LIGO, Virgo, and KAGRA collaborations have achieved remarkable sensitivity and led to the first direct detections of GWs from merging black holes.

Much less is known about the GW spectrum at higher frequencies, well above the kilohertz reach. No conventional astrophysical objects are expected to generate strong signals there, which makes this regime particularly interesting as a potential window into new physics. Possible sources include processes from the very early universe or phenomena beyond the Standard Model of particle physics.

Our group is developing experimental approaches to explore this high-frequency domain. These efforts include the use of superconducting radio-frequency cavities as sensitive detectors of tiny distortions in spacetime, as well as novel optomechanical systems. By pushing technology into this unexplored range, we aim to test fundamental physics in an area where any detection would provide unique and transformative insights into the universe.