AlInN as high-index-contrast material for GaN-based optoelectronics

High quality AlInN was grown near lattice-matched to GaN. It shows about 7% index contrast with GaN. AlInN is thus a promising alternative to AlGaN, as demonstrated by a 20-pairs AlInN/GaN distributed Bragg reflector with over 90% reflectivity. Light emitting diodes with active layers grown on top of AlInN/GaN multi-layers exhibit internal quantum efficiencies comparable to those of reference diodes grown directly on GaN buffer, this further demonstrate that AlInN material quality can meet the needs of optoelectronic application.