MOVPE Growth of Ga1-xAlxAs–GaAs Quantum Well Heterostructures

Abstract
Ga1-x Al x As–GaAs quantum wells are grown by MOVPE. Wells as narrow as 25 Å are made. Interface quality in relation to alloy clustering and abruptness in change of Al-content are characterized with the aid of luminescence spectrum measurements. A remarkable agreement is found between the experimental n=1 electron to heavy hole transition energies and those which are calculated with the simple rectangular well model. The results indicate that the Al-content changes at the interfaces over less than one unit cell.

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