Internal transitions of confined neutral magnetoexcitons in GaAs/AlxGa1–xAs quantum wells

Authors

H. A. Nickel, State University of New York at Buffalo, USA
G. Kioseoglou, State University of New York at Buffalo, USA
T. Yeo, State University of New York at Buffalo, USA
H. D. Cheong, State University of New York at Buffalo, USA
A. Petrou, State University of New York at Buffalo, USA
B. D. McCombe, State University of New York at Buffalo, USA
D. Broido, Boston College, Massachusetts, USA
K. K. Bajaj, Emory University, USA
R. A. Lewis, University of WollongongFollow

RIS ID

5235

Publication Details

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.

Abstract

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.