The Lost One
It's all about: from what is a photon made ?
Answer that and we can evolve further.
That's a good question, and I wish I could answer that.
I am still relatively new in the whole particle physics, quantum mechanics, general relativity, string theory. They are not something that I had studied back in my university's days.
I am more of dabbler in these more advanced physics fields, because I have always been fascinated by astronomy (though I have never formally study this - astronomy), and only in the last 4 or 5 years, in my own free time, I have been reading up on it, because learning anything about astronomy, will eventually lead one to needing to learn about cosmology. And learning about cosmology, will lead one to reading up on relativity, particle and quantum physics, etc.
In my time, at the universities, I have never study any of those fields, because I was essentially applied science type of guy, because of the courses (civil engineering and computer science) I had chosen to do. So I am more of an engineer than a scientist, and being an engineer, I only need to study the fields that were "needs-to-know"; so everything weren't included in my studies.
The closet thing I came close to studying photon in my college's days is in my electronics subjects, in my computer science course, where I have to study about light, more specifically - lasers - because they are used as form of data transmission in fibre optic networking. Here, I have to some understanding about light, optics and electromagnetism.
As I have said, I am more of practical (applied) physics, but it has only been very recent that I have venturing into the more theoretical side to physics. And though I am a dabbler, I am still learning.
And the only reason why I am reading up on photons, because to understand how the Big Bang cosmology make matters, I need to learn some of the basics in particle physics.
So for now, I still need to learn more, if I am to have a chance to answering your question about photons.