Continuous-Wave Operation at 250 K of InGaN Multiple Quantum Well Laser Diodes Grown on 6H-SiC with Vertical Conducting Structure

Abstract
We demonstrated continuous-wave operation at 250 K of InGaN multiple quantum well laser diodes that were grown on 6H-SiC and had a vertical conducting structure in which p-type and n-type electrodes were formed at the top and the bottom of the chip, respectively. The threshold current, threshold voltage, and threshold current density were 380 mA, 12.6 V, and 12 kA/cm2, respectively. The laser diodes were operated at room temperature with a duty ratio up to about 20% at a repetition frequency of 1 kHz.