The first cars were slower than horses however that is no longer the case. The prototype is not the point, it’s what can be achieved from developing the technology. It will eliminate bottlenecks in places too tiny to place a modern fet
Green light is 500nm. We are already at 5nm with current commercial electronic circuits. In integration light will never beat the electrons. It will never be faster. You won't put more gates on chip.
But what about other aspects, such as for example radiation hardening for electronic devices used in space ? Would this make them more or less susceptible to radiation ?
Do we need to use visible light? Often when speaking of light people mean the entire electromagnetic spectrum. X-rays can be 10 picometers, but would that be too much energy?
