I don't think he used the word photon, but he did describe light as particles, and had (flawed, but that is science) arguments for that (http://www.studyphysics.ca/newnotes/20/unit04_light/chp1719_...)
I don't think he used the word photon, but he did describe light as particles, and had (flawed, but that is science) arguments for that (http://www.studyphysics.ca/newnotes/20/unit04_light/chp1719_...)