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The authors report on strategies to achieve lasing in electrically driven vertical cavity surface emitting lasers at room temperature, namely the improvement of the quality factor of a microcavity suited for electrical injection, the use of a ZnO contact together with a dielectric current confinement layer and oxidized AlInN/GaN distributed Bragg reflectors.
In this presentation, the main drawbacks of GaN based microcavities (MCs) are first pointed out. Achieving high quality factor MCs is a tough task because of intrinsic material properties like the lattice mismatch existing between GaN and AlN. To circumvent this issue, a different strategy based on lattice-matched AlInN alloy is adopted. Although difficult to grow, AlInN epitaxial layers can be successfully...
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