And of course it becomes further complicated because finding a solution for bulk  silicon is not enough since SOI wafers are required to support the optical  properties for silicon photonics. 

I have always found it interesting that the attempt to produce a hybrid laser in this manner creates localized heating in exactly the location where thermal transfer is limited by surface area. So basically a hot spot is created in exactly the worst possible location where it can cause the most damage. 

Again POET isolates the heat signatures and the dielectric stack is designed to channel heat effectively to the heat sinks.  How can you compete with that especially when we are talking about increasing the density for future bandwidth requirements?

And as a reminder POET uses lower cost bulk silicon so it almost becomes comical  that in some ways POET is more of a silicon solution than silicon photonics.