Dependence of electron temperature on well width in the Al0.48In0.52As/Ga0.47In0.53As single-quantum well

The temperature of electrons confined in a single quantum well (SQW) as a function of well width (L
z
) from
L_{z} = 14.5
Å to
L_{z} = 130.5
Å have been determined from photoluminescence spectra of a set of undoped (Al,In)As/(Ga,In)As SQW's. From steady state electron temperature variation with L
z
it is shown that the electron and longitudinal optical phonon scattering dominates the excess energy loss of the thermalized two dimensional electrons in the SQW's and the scattering rate is independent of L
z
within our experimental accuracy. The average energy loss rate per hot-electron was determined to be much smaller than expected.