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[0044] POET can be used to construct a variety of high performance transistor devices, such as complementary NHFET and PHFET unipolar devices as well as n-type and p-type HBT bipolar devices. POET can also be used to construct a variety of optoelectronic devices which include:

- a thyristor VCSEL laser;

- an NHFET laser;

- an PHFET laser;

- a thyristor optical detector;

- an NHFET optical detector;

- a PHFET optical detector;

- a semiconductor optical amplifier (SOA) or a linear optical amplifier (LOA) based on either one (or both) of the n-type and p-type quantum well interfaces;

- an absorption (intensity) optical modulators based on either one (or both) of the n-type and p-type quantum well interfaces;

- a phase modulator based on either one (or both) of the n-type and p-type quantum well interfaces;

- a waveguide switch; and

- a passive waveguide.