Ring-shaped luminescence patterns in a locally photoexcited electron-hole bilayer

Abstract

We report the results of molecular dynamics simulation of a spatiotemporal evolution of the locally photoexcited electrons and holes localized in two separate layers. It is shown that the ring-shaped spatial pattern of luminescence forms due to the strong in-layer Coulomb interaction at high photoexcitation power. In addition, the results predict (i) stationary spatial oscillations of the electron density in quasi one-dimensional case and (ii) dynamical phase transition in the expansion of two-dimensional electron cloud when threshold electron concentration is reached. A possible reason of the oscillations and a theoretical interpretation of the transition are suggested.

6 pages, 5 figures. Final version as published + Erratum has been added

References in corpus (1)

• Undoped Electron-Hole Bilayers in a GaAs/AlGaAs Double Quantum Well

Cited by in corpus (4)

• Drift-diffusion model of the fragmentation of the external ring structure in the photoluminescence pattern of indirect excitons in coupled quantum wells
• Forming and confining of dipolar excitons by quantizing magnetic fields
• Ring-shaped spatial pattern of exciton luminescence formed due to the hot carrier transport in a locally photoexcited electron-hole bilayer
• Controlling free superflow, dark matter and luminescence rings of excitons in quantum well structures