Comment by aj7

Just want to remind people that the deBroglie wavelength of light IS its wavelength, here 0.5-1.5 um. This is gigantic compared to that of electrons in semiconductors. So there is no VLSI for optical computation. None. Zero. Bupkis. Lasers, except perhaps for some very esoteric applications, will be confined to the periphery where waveguides and fiber are rapidly supplanting copper. By the way, at least $1B has been wasted by VC’s who did not understand the no-VLSI physics barrier.