Abstract
Intersubband transitions in As/InP quantum wells have been studied by magnetic circular dichroism (MCD) of the absorption. The g values of the heavy and light holes in the different subbands are deduced from the intensity dependence of the MCD signals on the applied magnetic field: =-0.68±0.1, =-1.81±0.4, and =8.87±1.2. These results are in good agreement with effective-mass-theory calculations and allow one to estimate the in-plane effective masses of the second heavy-hole (=0.) and the first light-hole (=0.) subbands. An observed increase of the half-width of the subband transitions with increasing transition energy and increasing magnetic field is qualitatively explained by statistical fluctuations of the quantum-well width.
DOI:https://doi.org/10.1103/PhysRevB.55.9924
©1997 American Physical Society