Answers are grounded in this paper and cite their sources.
Luminescence and excitation spectra were studied on molecular-beam-epitaxially grown GaAs-Al0.44{Ga}0.56$As quantum-well structures consisting of ten periods, each period having a 100-nm well separated from a 5-nm well by a 5-nm barrier. Luminescence below the photon energy of the heavy-hole exciton transition in the narrow well was observed and accounted for in position, shape, and strength in terms of tunneling-assisted photon emission between the narrow and wide wells.
No takes yet. Share an insight, caveat, or question.
Nelson et al. (1986) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: