Resonant-cavity light-emitting diodes operating at 655 nm with a high external quantum efficiency and light power

Monolithic resonant cavity light-emitting diodes exhibiting an external quantum efficiency (/spl eta//sub ex/) up to 6.5% for 84-μm size devices at a wavelength at 655 nm have been demonstrated. Larger diodes, 150-300 μm in diameter, have the maximum /spl eta//sub ex/ between 5.5% and 4.9% and launch power output up to 8 mW.