Abstract
Energy renormalization of the excitonic resonance due to pair correlations within the electron gas in semi-conductors is well known. Higher order correlations give rise to quasiparticles such as biexcitons, yet the energy renormalizations associated with a given density of these complexes are unknown. We present ultrafast polarization-selective pump-continuum-probe data which demonstrate that, at high density, interband recombination in wide-gap semiconductors at 4 K is preceded by a phase dominated by biexcitons and that there is a distinct blue-shift of the exciton resonance due to the biexciton gas.
| Original language | English |
|---|---|
| Article number | 081201 |
| Pages (from-to) | 812011-812014 |
| Number of pages | 4 |
| Journal | Physical Review B: Condensed Matter and Materials Physics |
| Volume | 63 |
| Issue number | 8 |
| Publication status | Published - 2001 |