We present GaAs/AlGaAs p-i-n multiple-quantum-well modulators solder-bonded to a silicon substrate. The GaAs substrate is then chemically removed to allow operation at 850 nm. The gold contact to the modulator is used as the reflector. We achieve a change in reflectivity from 26% to 52% for a 0 to 10 V bias swing. Our device has a modulation saturation intensity of 80 kW/cm 2, demonstrating superb heat-sinking and ohmic contact. We cycled our hybrid from 30-degrees-C to 100-degrees-C over a 100 times, and it showed no degradation, exhibiting the practicality of our technique.