Research of low-resistance low-self-heating vertical-cavity surface-emitting laser array with graphene electrode

The thermal crosstalk effect severely limits the application of Vertical-Cavity Surface-Emitting Laser (VCSEL) array. In this paper, using the high transparency and ultra-fast mobility of graphene, we have designed a VCSEL array with graphene electrode (Gr-VCSEL array). By avoiding lateral transport of current, the series resistance and self-heating of Gr-VCSEL are reduced. Compared with traditional VCSEL array, the 10×10 Gr-VCSEL array achieves a 20.6% reduction in series resistance and a 26% decrease in red-shift rate of wavelength. Benefit by the high thermal conductivity of graphene electrode, the thermal resistance of Gr-VCSEL array is reduced by 7.8%. This structure has excellent thermal properties and is not limited by wavelength, which provides a new method for the development of VCSEL array.