Bistable photosensitive device utilizing tunnel currents in low resistive state
Abstract
Abstract A photoconductive switch is constructed in sandwichlike form with two conductors as the outer layers and photosensitive semiconductor material as the thin inner layer. At operating temperatures, the semiconductor material having a state of high resistivity in darkness is excited by incident radiation to a state of less resistivity. During this latter state the magnitude of the electron tunneling current moving from one conductor to another across the semiconductor material is greatly increased. Means for keeping the semiconductor material in the state of less resistivity is possible as is means for readily changing the layer between the two states. In one embodiment of the switch the conductors are cooled to a superconducting state in which the unusual current-voltage characteristics of the superconductor junctions are utilized.
Inventors
- 👤 Ivar Giaever
Bibliographic Details
Claims Analysis
Total Claims: 2References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |