Abstract
A combined investigation of the coherent and incoherent dynamics of optically excited charge carriers in a superlattice structure is presented. The coherent dynamics was probed by THz-emission spectroscopy while the population dynamics of the electrons were measured at comparable densities with a two-color pump/probe transmission setup. For electrons in the e1 miniband, the phonon-emission time is determined by measurement of differential-transmission-change spectra (DTS) transients at different excitation photon energies below and above the energy threshold for LO-phonon emission. A comparison of the characteristic time constants provide evidence for the conservation of the phase of the intraband coherence on LO-phonon relaxation.
| Original language | English (US) |
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| Pages | 35-36 |
| Number of pages | 2 |
| State | Published - 1997 |
| Externally published | Yes |
| Event | Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS - Baltimore, MD, USA Duration: May 18 1997 → May 23 1997 |
Other
| Other | Proceedings of the 1997 Conference on Quantum Electronics and Laser Science, QELS |
|---|---|
| City | Baltimore, MD, USA |
| Period | 5/18/97 → 5/23/97 |
ASJC Scopus subject areas
- General Physics and Astronomy