| 摘要 |
PROBLEM TO BE SOLVED: To provide a quantum phototransistor which has a simple structure and is highly integrated and has a high sensitivity and low power consumption, so that it causes an optical current to flow by a single carrier and has a rapid signal transmission speed and has a high amplification factor. SOLUTION: A conductive region 53 is formed by a quantum structure, in which a difference in the constraint energies of the holes or electrons, is formed between two electrodes 50 and 51. When a light or electromagnetic wave is applied on a partial depletion region of the electrons or holes generated in the quantum structure, pairs of the electrons and the holes are generated in the partial depletion region, canceling depleting in the region and then causing a current to flow therein. The quantum structure, such as a point contact, quantum fine line, and quantum dot, is such that a potential barrier formed from quantum effects of the conductive region, that is, from the constraint energy of one or zero dimension of electrons or holes is formed so that it can be controlled. |
