Patent ID: 7119359

Claim:
A sequential resonant tunneling device for back-side illumination, comprising an alternating semiconductor layer structure as follows: Thick- ness Material (nm) Dopant Doping level c-plane (0001) Not Not Not limited sapphire limited limited substrate AlN 10 un-doped 0 Al 0.2 Ga 0.8 N 1000 silicon 1 × 10 18 cm −3 Al 0.27 Ga 0.73 N 5 undoped 0 GaN 4 undoped 0 Al 0.27 Ga 0.73 N 7 undoped 0 QW unit {open oversize brace} GaN 4 undoped 0 . . . . . . . . 30 QW units {open oversize brace} . . . . Al 0.27 Ga 0.73 N 7 undoped 0 GaN 4 undoped 0 Al 0.27 Ga 0.73 N 5 undoped 0 GaN 300 magne- 1 × 10 18 cm −3 sium.