Spontaneous emission from a quantum-well GaN/InGaN/AlGaN heterostructure at high pump currents

An investigation was made of the electroluminescence spectra of a structure with an In x Ga 1- x N (3 nm thick) quantum well pumped by current pulses of up to 4 kA cm -2 density at T =77 and 300 K. Considerable spectral broadening (Δ E =150–200 meV) of nonthermal nature was observed. A preliminary study was made of the stability of this light-emitting structure pumped by high-current pump pulses.