Electromagnetic wave modulator equipped with coupled quantal wells, and application to an electromagnetic wave detector
US5311221A · kind A · utility
6Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1989 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | May 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/01708
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A semi-conducting structure delimits two quantal wells (CP1, CP2) connected across a barrier layer (CB). The application of an electric field to the structure makes possible the transfer of electrons from one of the wells to the other. The electron-hole pairs are created by a wave-pump, or by the doping of one of the wells. This makes possible, in particular, a dual control by means of the wave-pump and the electric field, thus creating an "AND"-function modulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.