Electroluminescence of InAlAs/InGaAs HEMTs lattice-matched to InPsubstrates

Electroluminescence (EL) due to the electron-hole recombination in the channel of InAlAs/InGaAs HEMTs lattice-matched to InP substrates has been measured at room temperature. The carrier temperature extracted from the obtained spectra has been found to be approximately 300 K. It has also been found that the EL comes from a region between the source and the gate by measuring its spatial distribution. These two features imply that holes generated at the drain edge in the channel due to the impact ionization pile up and recombine with the majority electrons between the source and the gate, and agree with results of theoretical analysis