Epitaxy: Patterned Growth
- Semiconducting compounds with a smaller bandgap (GaAs) are grown on the surface of a compoundwith a larger bandgap (AlGaAs).
- Growth is restricted by coating it with a masking compound (SiO2) and etching that mask with the shape of the required crystal cell wall shape.
- Disadvantage: density of
quantum dots limited by
mask pattern.
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