[Jedi Master Pikachu]

ping?

[wodinoneeye]

The problem is how do you make a switch using light that switches fast enough (without a chemical change). Photo multipliers as amplifiers and phase cancellation for negation.... Dimensional stability becomes critical (expansion of materials disrupts carefully placed geometries needed for wave based effects needed to make it work)

[grey_whiskers]

Sorry, noticing the University of Bath brought to mind The Canterbury Tales:

Why else the proverb written down and set
in books: "A man must yield his wife her debt"?
"What means of paying her can he invent
Unless he use his silly instrument?"
Cheers!