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Microsoft's light-based computer marks 'the unravelling of Moore's Law'
(www.pcgamer.com)
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this post was submitted on 01 Jul 2023
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Optical components are already used in some parts of servers, in interconnects. But I don't expect them to replace silicon for general purpose processing ever. One thing that's never noted in these scientific press releases is that optical components are huge. The wavelength of light is about a micron, i.e. a thousand times larger than the feature sizes of silicon electronics. This limitation can't be easily overcome.
"Can't easily be overcome" is true but it's worth bearing in mind that the features in silicon electronics you're referring to are actually etched by light in many cases. There may be ways to cheat, even if it doesn't sound intuitive.