David was a Ph. D student in our group, from 1 September (2013) to 20 July (2016), when he became of doctor Cum Laude. He was working on polariton flow (see his thesis, which received a Premio Extraordinario).
He was for a time a post-doctoral researcher in the group of Matthew Davis and then moved back to France in the area of Marseille. Last time we heard, he was working on astrophysics! He looks a bit like Schrödinger (physically) and, interestingly, he chose a fragmented Erwin face for his Twitter profile.