Abstract
Quantum wells (QWs), which can be made from alternate thin layers of two semiconductor materials, show a large electroabsorption called the quantum-confined Stark effect (QCSE). This made possible the realization of electrically controlled optical modulators, and optically controlled self electro-optic effect devices (SEED), that can operate at high speed and low energy density. We will review the various materials systems that have shown QCSE and some of the different devices that have already been fabricated, the latest among them being an optically controlled spatial light modulator, an optically addressed dynamical memory, and an optical S-R latch.
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