A giant anti-Stokes photoluminescence is observed at low excitation densities on specially designed semimagnetic II--VI asymmetric double quantum well structures by applying an external magnetic field. The signal is due to a two-step absorption process, mediated by a long-living spatially indirect exciton, created via rapid electron tunneling from the primarily excited direct exciton state.
No takes yet. Share an insight, caveat, or question.
Heimbrodt et al. (1999) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: