  We propose a novel idea to detect a dark photon in gravitational wave
experiments. Our setups are capable of performing the whole process of dark
photon production, its decay products, and new physics signal discovery. This
mini-LHC is inspired by the recent idea of dark photon detection using laser
light in light shining through the wall (LSW) experiments such as ALPS II.
Taking the subfrequency light emitted from the laser source as the new physics
signal, we show that the sensitivity of our proposal is 2orders of magnitude
better than the original idea in the LSW studies.
