Light controlled spatial and angular electromagnetic wave modulator
US5305123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2225/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A 2D/3D optically controlled spatial and angular electromagnetic wave modulator is disclosed. The modulator of the present invention modulates the amplitude and direction of an electromagnetic wave such as millimeter microwaves or infrared waves by diffracting or scattering the electromagnetic wave from a semiconductor material upon which is incident a controlling lightwave. The lightwave incident upon the semiconductor is of varying intensity, and may be time varying, and changes the complex refractive permittivity of the semiconductor material. The electromagnetic wave is thus modulated in accordance with the controlling lightwave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.