| 摘要 |
PROBLEM TO BE SOLVED: To spatially separate holes generated in quantum dots in an optical semiconductor memory from electrons to the extent that their recombination do not occurs. SOLUTION: The optical semiconductor memory has at least a laminated structure composed of a first semiconductor layer 4, a second semiconductor layer 2, a barrier layer 3 and quantum dots 1 laminated one above the other, the quantum dots 1 are used as holders for electrons 7 and the second semiconductor layer 2 is used as acceptors for holes 8 generated in the quantum dots 1.
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