I’m not sure if it’s what you’re asking, but one photon can give rise to two, lower frequency photons under certain circumstances: https://en.m.wikipedia.org/w

I’m not sure if it’s what you’re asking, but one photon can give rise to two, lower frequency photons under certain circumstances: https://en.m.wikipedia.org/wiki/Spontaneous_parametric_down-conversion https://en.m.wikipedia.org/wiki/Spontaneous_parametric_down-...