A Semiconductor-Based Photonic Memory Cell

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Science  26 Feb 1999:
Vol. 283, Issue 5406, pp. 1292-1295
DOI: 10.1126/science.283.5406.1292

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Photonic signals were efficiently stored in a semiconductor-based memory cell. The incident photons were converted to electron-hole pairs that were locally stored in a quantum well that was laterally modulated by a field-effect tunable electrostatic superlattice. At large superlattice potential amplitudes, these pairs were stored for a time that was at least five orders of magnitude longer than their natural lifetime. At an arbitrarily chosen time, they were released in a short and intense flash of incoherent light, which was triggered by flattening the superlattice amplitude.

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