Look at the drop-down tabbed pages from this Experiments page for details on various experiments I have performed, trying to detect Anisotropy in the speed of light through the Earth's reference frame and the speed and direction of the Aether wind.

See these animations below comparing the operation of a Vacuum-Mode interferometer, a Gas-Mode interferometer and an electronic conductor interferometer featuring longitudinal Electromagnetic waves rather than the transverse waves in optical interferometers.

They illustrate how and why it is possible in a Gas-Mode or electronic conductor interferometer to detect the light speed anisotropy in a moving frame due to the slightly slower (or faster in the case of the electronic conductor interferometer) propagation speed of the light down the transverse interferometer arm compared to the longitudinal arm. The Blue dots in the Gas-Mode models represent molecules of Gas (or electrons) that absorb/re-emit the light. The Red dots represent orthogonal photons traveling along the arms of the interferometer.