I didn't read it all yet, but I imagine they made it transparent again and saw the beam come out. It likely couldn't ever hold it indefinitely as thermal entro

I didn't read it all yet, but I imagine they made it transparent again and saw the beam come out. It likely couldn't ever hold it indefinitely as thermal entropy would likely scramble it to undetectable levels again. But this could be a really cool way to start building some digital optical delay lines depending on how it works.