Unexpectedly Slow Two Particle Decay of Ultra-Dense Excitons in Cuprous Oxide

Abstract

For an ultra-dense exciton gas in cuprous oxide (Cu${}_2$O), exciton-exciton interactions are the dominant cause of exciton decay. This study demonstrates that the accepted Auger recombination model overestimates the exciton decay rate following intense two photon excitation. Two exciton decay is relevant to the search for collective quantum behavior of excitons in bulk systems. These results suggest the existence of a new high density regime of exciton behavior.

Solid State Communications (2013)

References in corpus (2)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Transition to a Bose-Einstein condensate of excitons at sub-Kelvin temperatures

Cited by in corpus (6)

• Vacancy Relaxation in Cuprous Oxide (Cu${}_{2-x}$O${}_{1-y}$)
• Evaluation of defects in cuprous oxide through exciton luminescence imaging
• Photochemical Upconversion Light Emitting Diode (LED): Theory of Triplet Annihilation Enhanced by a Cavity
• Third Harmonic Generation in Cuprous Oxide: Efficiency Determination
• Photoionization cross section of 1s orthoexcitons in cuprous oxide
• Collective two-boson decay of excitons in Bose-Einstein condensate and generation of coherent photon-phonon radiation