J. Blondelle et al., 16-PERCENT EXTERNAL QUANTUM EFFICIENCY FROM PLANAR MICROCAVITY LEDS AT 940 NM BY PRECISE MATCHING OF CAVITY WAVELENGTH, Electronics Letters, 31(15), 1995, pp. 1286-1288
High efficiency substrate emitting microcavity InGaAs/(Al)GaAs 3 QW LE
Ds are reported. The use of regrowth for cavity resonance tuning and i
ts effect on device performance, are demonstrated. The best results ob
tained include external quantum efficiencies of 16%. At 5mA, 1mW optic
al power is delivered with an intensity of 280 mu W/sr.