Watt-Class Green Laser Diodes on Semipolar {20–21} Gallium Nitride Substrates

High-power green laser diodes were successfully fabricated on semipolar {20–21} GaN substrates with a maximum output power of more than 2 W. Semipolar {20–21} GaN was shown to be useful for obtaining a high output power and high wall-plug efficiency in green laser diodes.