Electron effective mass determined from experimental electron eigen-energies in InGaAs/InAlas multi-quantum wells

In a In
_0.53
Ga
_0.47
As/In
_0.52
Al
_0.48
As multi-quantum wells structure, interband transitions were clearly observed in a photocurrent difference spectrum. Using an assumption that the energy dependence of electron effective mass varied smoothly toward higher energy, its nonparabolicity was explicitly determined from 0.041 m
₀
to 0.07 m
₀
in conduction quantum well.