Bulk growth of cadmium mercury telluride (CMT) using the Bridgman/accelerated crucible rotation technique (ACRT)

We are currently routinely growing 20-mm-diameter, 200-mm-long crystals of ∼0.5-kg weight with good uniformity of composition and good electrical properties for first-generation photoconductive IR detector programmes that require low carrier concentration n-type material. Compositions produced range from x∼0.7 (∼1.3 μm) through to x∼0.0 (i.e. HgTe), the latter in the tail ends of the crystals.