Abstract
Electron-hole recollisions are induced by resonantly injecting excitons with a near-IR laser at frequency into quantum wells driven by a field oscillating at . At , up to 18 sidebands are observed at frequencies , with . Electrons and holes recollide with total kinetic energies up to 57 meV, well above the threshold for longitudinal optical (LO) phonon emission. Sidebands with order up to persist up to room temperature. A simple model shows that LO phonon scattering suppresses but does not eliminate sidebands associated with kinetic energies above .
- Received 10 September 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.267402
© 2013 American Physical Society