Redpill me on optical computing and photonics, /sci/.
From the very brief Google searches I've made on the subject the prospect of creating optical processors or co-processors seems extremely exciting to me. At least it probably can cut the amount of time needed for physics- and chemistry-related calculations which is always a plus. But I never was really good with optics, and I have no idea how underlying processes work and where should I begin if I want to take on this field of study.
What is the theoretical minimum I need to begin to understand optical computing and underlying mechanisms? Links or directions to any good reads would be greatly appreciated.
Are there any good journals I should keep my eye on? Is there even anything new going on in this field or it's completely dead?
Should I even be hyped? Are there any hidden obstacles that prevent a viable product from appearing as a result of research?

Thanks in advance /sci/.