posted on 2024-11-13, 23:30authored byH A Nickel, G Kioseoglou, T Yeo, H D Cheong, A Petrou, B D McCombe, D Broido, K K Bajaj, Roger LewisRoger Lewis
Optically detected resonance spectroscopy has been used to study resonant absorption of electrons, holes, and their complexes in GaAs/AlxGa1–xAs quantum wells (QW's) in magnetic fields up to 15 T. In undoped multiple-QW samples with well widths of 12.5, 15, and 20 nm, in addition to an electron and two hole cyclotron resonances, 1s-->np+,– (in the hydrogenic notation) internal exciton transitions (IET's) arising from two distinct neutral heavy-hole magneto-excitons were observed. The unique capability of observing electron and hole cyclotron resonance as well as several IET's in a single sample permitted verification of a predicted relationship resulting from the symmetry of the magnetoexciton Hamiltonian, namely, [h-bar](omegae–omegah) = E1s-np+–E1s-np–, where omegae(omegah) is the electron (hole) cyclotron frequency, and E1s-np+ (E1s-np–) is the energy of the 1s-->np+ (1s-->np–) transition.
History
Citation
This article was originally published as: Nickel, HA, Kioseoglou, G, Yeo, T, Cheong, HD, Petrou, A, McCombe, BD, Broido, D, Bajaj, KK & Lewis, RA, Internal transitions of confined neutral magnetoexcitons in GaAs/AlxGa1–xAs quantum wells, Physical Review B, 2000, 62(4), 2773-2779. Copyright 2000 American Physical Society. The original journal can be found here.