Modelisation of Light Transmission through Surfaces with Thin Film Optical Coating in Geant4
Résumé
Surfaces with optical coating may be used to improve light transmission between a scintillating crystal and a photodetector. For the ClearMind project, we develop a detection module made of a PbWO
4
crystal and a photocathode directly deposited on a thin passivation film coating the crystal face. Scintillation photons will then be transmitted through this thin film that has a thickness of the order of the scintillation light wavelength. Interference phenomena and frustrated transmission beyond the limit angle have then to be considered. We present the modelisation of light transmission through surfaces with optical coating with Geant4, which is achieved by defining a new method that provides a probability of transmission of a visible-UV photons through the coated interface
Mots clés
Surface waves
Computational modeling
Crystals
Optical variables control
Optical imaging
Coatings
Optical refraction
antireflection coatings
lead compounds
light transmission
optical films
passivation
photocathodes
photodetectors
scintillation
solid scintillation detectors
thin film sensors
ultraviolet spectra
visible spectra
thin film optical coating
Geant4
scintillating crystal
PbWO4 crystal
passivation film coating
crystal face
scintillation photons
scintillation light wavelength
frustrated transmission
coated interface
Domaines
Physique [physics]
Origine : Fichiers produits par l'(les) auteur(s)