Photonis France

Photonis France Sas

Gert Nützel

Pascal Lavoute

Richard Jackman

Christophe Fontaine

An electromagnetic radiation detector includes an inlet window intended to receive a stream of incident photons, as well as a photocathode in the form of a semiconductive layer. A conductive layer is deposited on the downstream face of the inlet window and a thin dielectric layer is disposed between the conductive layer and the semiconductive layer. The conductive layer is brought to a potential below that of the semiconductive layer so as to drive the photoelectrons out of the recombination zone and consequently improve the quantum yield of the photocathode.

Photocathode with improved quantum yield

The invention relates to a semi-transparent photocathode () for a photon detector having an increased absorption rate for a preserved transport rate. According to the invention, the photocathode () includes a transmission diffraction grating () able to diffract said photons and provided in the support layer () on which the photoemissive layer () is deposited.

Semi-transparent photocathode with improved absorption rate

An electron multiplying structure for use in a vacuum tube using electron multiplying, the electron multiplying structure having an input face intended to be oriented in a facing relationship with an entrance window of the vacuum tube, an output face intended to be oriented in a facing relationship with a detection surface of the vacuum tube, wherein the electron multiplying structure at least is composed of a semi-conductor material layer adjacent the detection windows. Also disclosed is a vacuum tube using electron multiplying with an electron multiplying structure.

Electron multiplying structure for use in a vacuum tube using electron multiplying as well as a vacuum tube using electron multiplying provided with such an electron multiplying structure

A photo cathode for use in a vacuum tube including a cathode layer, having an entrance face capable of absorbing photons impinging on the cathode layer, and an exit face for releasing electrons upon impinging of the photons, and an electron exit layer, in facing relationship with the exit face of the cathode layer for improving the releasing of the electrons, and a carbon containing layer, positioned between the exit face of the cathode layer and the electron exit layer, for bonding the electron exit layer to the cathode layer.

Growing community of inventors

Brive la Gaillarde, France

Gert Nützel