We demonstrate integration of GaAs-AIGaAs multiple quantum well modulators to silicon CMOS circuitry via flipchip solder-bonding followed by substrate removal. We obtain $J.5~0 device yield for 32 x 32 arrays of devices with 15 micron solder pads. We show operation of a simple circuit composed of a modulator and a CMOS transistor.

We discuss the symmetric self-electrooptic effect device (S-SEED), a structure consisting of two p-in diodes electrically connected in series that acts as an optically bistable set-reset latch, and present applications and extensions of this device. The device does not require the critical biasing that is common to most optically bistable devices, and thus is more useful for system applications. We have optically cascaded these devices in a photonic ring counter, and have used them to perform differential NOR, OR, NAND, and AND logic functions.' Using the same device, we have also demonstrated a differential modulator that generates a set of complementary output beams with a single voltage control lead, and a differential detector that gives an output voltage dependent on the ratio of the two optical input powers.

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