Hot electron and hole cooling dynamics in quantum-confined

Rosenwaks et al. (1993) performed calculations on the PL intensity versus time and energy data to determine the time dependence of the qnasi-Fermi level, electron temperatnre, electronic specific heat, and ultimately the dependence of the characteristic hot-electron cooling time on electron temperatnre. 

The cooling, or energy-loss, rate for hot electrons is determined by LO phonon emission throngh electron-LO-phonon interactions. The time constant characterising this process can be described by the following expression (Ryan et al, 1984 Cai et al, 1986 Christen and Bimberg, 1990) 

The electron energy-loss rate is related to the electron-temperatnre decay rate throngh the electronic specific heat. Since the electron distribntion becomes degenerate at high light irradiance, the classical specific heat is no longer valid. Hence the temperatnre- and density-dependent specific heat for both the QW and bulk samples need to be calculated as a function of time in each experiment so that can be determined. 

the phonons are confined in the well and they exhibit slab modes (Campos et al, 1992), which enhance the hot phonon bottleneck effect. 

However, carriers in the space-charge layer at the surface of a heavily doped semiconductor are only confined in one dimension, as in a quantum film. This 

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