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We demonstrate six to ten period lattice‐matched In0.18Al0.82N/GaN distributed Bragg reflectors with peak reflectivity centred around 400 nm, grown by molecular beam epitaxy. Thanks to the well‐tuned ternary alloy composition crack‐free layers have been obtained as confirmed by both optical and scanning electron microscopy. In addition, cross‐sectional analysis by high resolution transmission electron microscopy reveals highly periodic structure with abrupt interfaces. When the number of DBRs periods increased from six to ten, peak reflectivity increased from 45% to 60%. This increase was found to be in reasonable agreement with theoretical simulations. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Gačević et al. (2009) studied this question.
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