Optically controlled cold-cathode electron tube
US8427039B2 · kind B2 · utility
3Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2007 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2201/30469
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In an optically controlled cold-cathode electron tube, the emitters 1, of nanometer and/or micron size and of elongate shape, have a structure comprising a first material (4) of sp2-bonding carbon type and a metallic second material (3), said first material being in contact with and surrounding said second material at its top and over the entire length of the emitter or at least part of said length starting from its top toward the base (b). The second material has a plasma frequency substantially equal to or greater than the frequency of the optical control wave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.