I guess this gentleman is on the same page as POET
“The photonic layer should be the interposer and provide the communication layer, both between chiplets and to the outside world,” says Pond.
https://semiengineering.com/chipmakers-getting-serious-about-integrated-photonics/
Just a general article btw, but still i'm happy to finally read some article that kind of "validate towards" what POET has been developing for the past years.