I am trying to find an intuitive explanation for the stimulated emission phenomenon. I know the effect: a photon with the right frequency "interacts" with an excited electron to create a copy of itself( same phase, same amplitude, same state) putting the electron to a lower energy state... But this doesn't fit as easily as the excitation of an unexcited electron...What I mean is, a photon with the right energy interacts with an electron and puts the electron into an excited state. This is much more intuitive and reasonable, at least for me. I am trying to find a similar reasoning for the stimulated emission, is there one that you guys know of?