Improved intermixing in GaAs/AlGaAs quantum well structures through repeated implant-anneal sequence
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Tan, H. H.
Fu, L.
Johnston, M. B.
Dao, L. V.
Gal, M.
Jagadish, C.
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Ion (proton) implantation was used to induce intermixing in GaAs-AlGaAs quantum wells. Very large energy shifts (up to 160 meV) were observed after annealing. However, the energy shift was further improved with a repeated implant-anneal sequence. Up to about a factor of two increase in the energy shifts were obtained. This sequence was then used to fabricate laser diodes for multi-wavelength device integration. A remarkable improvement in the laser threshold characteristics was obtained with this sequence compared to a single implant.
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