Hi, RWP!!!
The article on "amoeba learning" is at the Karl Jaspers (not Popper) Forum,
http://www.douglashospital.qc.ca/fdg/kjf/55-TAHON.htm Alamo-Girl, regarding the photon speculation and Attila Grandpierre's work on the structure of consciousness: As I recall, he assigned different fields to different mind levels. He conjectures that the EM field is very important to conscious thinking; but that at deep mind levels, it is the photon, not the electron, that is critical. I take this to mean that he suspects that the brain/mind is coupled with the universal vacuum field at its very deepest levels.
I agree with you, he would find the Popp investigations to be highly significant for his own work. Fortunately, I know he will soon be reading the McTaggert book. :^)