Fig. 1

Avalanche photodiode schematic and energy band structure. (a) Schematic diagram of photocurrent amplification principle (hole dominant); (b) Three-dimensional view of the T2SLs LWIR-APD; (c) The band structures at low and high reverse bias.

Avalanche photodiode schematic and energy band structure. (a) Schematic diagram of photocurrent amplification principle (hole dominant); (b) Three-dimensional view of the T2SLs LWIR-APD; (c) The band structures at low and high reverse bias.