Abstract
III-nitride nanowire diode heterostructures with multiple In0.85Ga0.15N disks and graded InGaN mode confining regions were grown by molecular beam epitaxy on (001) Si substrates. The aerial density of the 60 nm nanowires is similar to 3 x 10(10) cm(-2). A radiative recombination lifetime of 1.84 ns in the disks is measured by time-resolved luminescence measurements. Edge-emitting nanowire lasers have been fabricated and characterized. Measured values of Jth, T-0, and dg/dn in these devices are 1.24 kA/cm(2), 242 K, and 5.6 x 10(-17) cm(2), respectively. The peak emission is observed at similar to 1.2 mu m. (C) 2015 AIP Publishing LLC.