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AssigneeThales
InventorsPierre Legagneux, Ludovic Hudanski, Jean-Philippe Schnell, Dominique Dieumegard, Pierrick Guiset, Alfredo De Rossi
Estimating the term…
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.
An optically controlled cold-cathode electron tube, the cold cathode comprising an emitter or a plurality of emitters, of nanometer and/or micron size and of elongate shape, wherein the emissive zone of each emitter comprises a first material of the carbon type with substantially sp2 bonding, covering, in direct or indirect contact, a metallic second material having a plasma frequency approximately equal to or greater than the frequency of the optical control wave.
Dependencies are inferred from the claim text.