Radiation detector, in particular for x- or gamma radiation, and method for producing it

Abstract

A radiation detector is disclosed, in particular an x-ray or gamma detector, having a number of photodetector elements that are arranged next to one another and establish a detection surface. A converter layer is further included, above the detection surface, that converts incident radiation of a first wavelength region into radiation of a second wavelength region. The photodetector elements are sensitive to radiation of the second wavelength region. The converter layer is designed as an at least two-dimensional photonic crystal that has a bandgap or at least a reduced transmission in all directions parallel to the detection surface for the radiation of the second wavelength region. The detector may reduce or even prevent crosstalk between individual channels without the need for dividing septa in the converter layer.

Dependencies are inferred from the claim text.