▎ 摘　　要

NOVELTY - The apparatus has a substrate (3) comprising an aperture (5) extending through the substrate, where the aperture includes a first end (7) and a second end. The substrate is arranged such that photon (17) incident on the first end of the aperture pass through the aperture to the second end. A photodetector (11) is positioned overlaying the second end of the aperture, where the photodetector comprises graphene functionalized with quantum dots. The aperture is non-filled. The substrate is arranged to absorb photons such that photons incident on an inner wall of an aperture are absorbed. USE - Apparatus for performing photodetection in a field of imaging applications i.e. x-ray detector (claimed) and medical applications i.e. vein mapping. ADVANTAGE - The apparatus improves efficiency of an imaging device which reduces x-ray dosage required. The apparatus reduces resolution of images positioned beyond Lopt. The apparatus improves quality of the graphene channel and reduces noise in signals obtained by the photodetectors, thus making the apparatus suitable for use with an x-ray scintillator and enabling high spatial resolution to be obtained without need for a columnar scintillator. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for performing photodetection in a field of imaging applications. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an apparatus in use as a camera. Substrate (3) Aperture (5) End (7) Photodetector (11, 13) Photon (17)