In the Standard Model of particle physics are we to think of the electron(positron) field and the photon field as separate fields? Is it possible to think of the electron(positron) field and the photon field as just different "modes of vibration" of some more basic field? Can this line of thought be take with the entire Standard Model, there is a fundamental field that can "move" or "vibrate" in different ways to give us all the fundamental fields? Is this simplification part of what string theory does? Thanks for any help!