Scintillation crystals coupled to photomultiplier tubes or silicon diodes are the most common detectors for X-ray and Gamma-ray detection. High density, high refractive index scintillators used in PET detectors are often plagued by an inefficient extraction of scintillation light. This results in inaccuracy in event coincidence timing sufficient to affect spatial resolution. RMD has developed photonic band gap structures to improve the critical timing and spatial resolution in PET detectors.
A photonic crystal structure etched in silicon using an e-beam.