i believe all matter was originally aetheric in nature: that was how the world we see was produced from the big bang. when we near the extreme concentration of aether at the side of the world, we revert to our original state, and are carried on the currents of aether along and through the world. once we leave the concentration, we're matter again.
think of it like heating. evaporate water, you can move it through a tunnel of gas. once it leaves the heat, however, it's back to liquid.
to neimoka, this form of teleportation is, in my view, fairly different, but you are ignoring how matter is being teleported. information is all that needs to be transmitted, as it means the matter at the far end takes on the necessary properties.