2. Main components of background noise

2.1 Microscopic approach to fluctuations

Consider a homogeneous semiconductor bar, of length L measured along the Ox axis, with two ohmic contacts (electrodes) at its ends, of type N ⁺ , so that the hole population can be neglected.

Let us denote by q the electron charge, n the electron density, $\overrightarrow{J_n}$ the current density vector, G _n and R _n the densities of electrons per unit volume and per second, which, respectively, enter...