... amongst other things, BASF is a wafer-materials additive producer.
their claim (to vastly simplify) is that adding BASF's magical spices to the GaAs substrate "soup" makes it taste oh so much better.
(if POET was a car engine, they perhaps would be the gaas line antifreeze)
if I remember correctly from my last visit, the UConn lab uses AXT's wafers as their blanks.
GLTA,
R.