Low-frequency noise in type-II superlattice MWIR nBn detector

The paper concerns low-frequency properties of mid-wavelength infrared type-II InAs/GaSb superlattice nBn detector. The current noise was directly measured in the range of 1–10
⁴
Hz at 77 K and detectivity was determined in this frequency range and temperature. The common 1/f component found in the noise spectra was shown to originate from random processes occurring in surface imperfections that modulate both side-wall leakage and bulk currents.