anti-photons?

I just finished reading Angels and Demons. It’s a very interesting book. The idea that everything has an opposite got me thinking. Antimatter is the opposite to matter, protons are opposite to antiprotons. What is the opposite of photons? Darkness is as absence of photons. But what is the opposite of photons? Is there some sort of anti-light particle? If photons meet anti-photons, would it result in a ginormous explosion? Or would they just cancel each other out?

I will have to do some research on this…