Abstract
We report on unique surface-emitting two-dimensional photonic-crystal lasers with the capability of not only single-mode lasing oscillation in a broad area but also generation of various beam shapes. More than 50×50 u m coherent lasing oscillation has been successfully achieved, and doughnut-shaped and single-lobed beams have been produced by engineering photonic-crystal structures. In addition, we achieved the record highest light-output power (46 mW) of a surface-emitting laser in CW condition at room temperature. These results indicate the realization of a completely new semiconductor laser.
