Hi, I am an Air Force physicist (AFSC 61D, Active Duty with the rank of Captain) - My advice is that if you have SPECIFIC interests, the Air Force is not for you. Even as an actual physicist, I have only a small amount of input into what I actually work on. The projects we do are driven by the national security strategy, national defense summary, and documents like the JOE 2035 (you can google these). As an Air Force physicist, it is more about being able to take on whatever the challenge is than have a narrow focus. It is the one area where physicists are expected to have a BROAD range of knowledge. If you want to be a technical expert in a specific area, you should look into being a DoD civilian scientist at somewhere like AFRL/RD (Air Force Research Labs, Directed Energy).
Most of the advice on here has been about enlisted roles, and as far as I know, the only enlisted Air Force job that would be remotely close is a 9S1XX, Scientific Applications Specialist, which is probably not quite what you are looking for but might give you a cool and valuable experience
I'm happy to answer any specific questions you have but it seems like this is probably not the path for you.