Abstract
Bias-dependent non-Gaussian dark current noise has been observed in p -type quantum-well infrared photodetectors. Time domain analysis of the noise revealed two-level telegraphlike fluctuations with exponentially distributed lifetimes that change dramatically with changing bias. The nature of the non-Gaussian fluctuations at intermediate voltages is ascribed to switching between two electric-field distributions corresponding to distinct tunneling probabilities out of the quantum wells. The finite transition time between the levels is identified with the recharging time.
| Original language | English |
|---|---|
| Article number | 231103 |
| Pages (from-to) | 1-3 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 87 |
| Issue number | 23 |
| DOIs | |
| State | Published - 2005 |
| Externally published | Yes |