Lasing up to 380K in a sublimated GaN nanowire

We report on GaN nanowire lasers fabricated by selective-area sublimation, and we show that sublimated GaN nanowires can exhibit ultraviolet lasing action under optical pumping beyond room temperature, up to 380K. We study by microphotoluminescence the temperature-dependent behavior of single nanowire lasers between 7K and 380K and extract a characteristic temperature of T=126K. We finally present a statistical study of the maximum lasing temperature in individual sublimated GaN nanowires and use it to assess the performance of the selective-area sublimation method for nanowire-based lasing applications.