Does this also mean you could build a computer/other electronic system that would be immune to a nuclear electro-magnetic pulse ?
"...mass produced silicon chips that combine electronics and photonics in a single chip..."
It’s already possible to shield small systems from EMP with a faraday cage (which also protects you somewhat from EM eavesdropping). No one is going to pay the price tag for it for the most part as the commercial electrical grid is not EMP shielded, and I’m not sure it’s effectively possible to shield equipment that is plugged into the grid at time of EMP.
Where on-chip optical components will probably really excel is cheaper optical fiber networking (Internet backbone routers), and interconnects like system busses, next generation Hi-Def video connections, network attached storage devices, and successors to firewire.
We can do that now, albeit expensively. There are many semiconductors/ics available in pkgs that are different than their commercial equivalent, that are "rad hardened" and much more expensive. The only fundamental electronic device I know of that is "immune" to EMP is the vacuum tube. These opto devices may be also, but their interfaces to the electron devices would not be unless made of the aforementioned special materials........