A photon isn't real. Its a quanta of EMR. Its like a gallon or a pint...
A photon being a quanta of energy and energy being the amount of work that can be performed by a force, the photon carries the gas needed / transferred or expended by a force.
We currently cannot measure or resolve anything with a λ shorter then h. We have to use probabilites and Quantum physics/mechanics for this. Its currently a limit which causes much confusion.
However, we see examples of this all around us.
Energy with a λ of h and shorter is what we call...