julian-poet, looks like we guessed correctly:

Platform number 2:

The present application builds upon technology (referred to by the Applicant as “Planar Optoelectronic Technology” or “POET”) that provides for the realization of a variety of devices.

GaAs

Gallium Arsenide (GaAs) is the semiconductor compound, or Aluminum Gallium Arsenide (AIGaAs), which would probably be used for electron confinement.

Thank you oz4m2, and thank you Dr. Taylor, of course.

POET's value increases with this patent.

aimho

Go POET