High performance deep red AlAs/AlGaAs top-emitting VCSELs grown by MOVPE at high growth rates |
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Authors: | M Moser K H Gulden J Epler and H P Schweizer |
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Institution: | Paul Scherrer Institute Zurich, Badenerstrasse 569, CH-8048, Zurich, Switzerland |
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Abstract: | Top-emitting Alas/AlGaAs vertical cavity surface emitting lasers emitting at 765 nm with minimum threshold currents of 0.6 mA and threshold voltages of 1.9 V have been grown by MOVPE. In order to keep the growth time low, we investigated the possibility to grow these structures at growth rates of 5 μm/h. Special attention was paid to the homogeneity that can be achieved over a 2″ wafer under these growth conditions. Spatially resolved reflectivity measurements on GaAs/AlAs distributed Bragg reflectors showed, that the growth rate varies less than 0.3% in the center of the wafer and decreases by 1% at the wafer edge. |
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