Conservation of intraband coherence upon carrier relaxation by LO-phonon emission Meier, Torsten Wolter, F. Roskos, H.G. Je, K.-C Hader, J. Rossi, F. Köhler, K. Koch, S.W. Kurz, H. The evolution of the quantum mechanical phase of electronic wave packets on seattering-with phonons is an issue of great relevance in solid-state physics. In semiconductor superlattices, evidence for phase conservation on scattering was obtained when time-resolved THz-emission experiments indicated that the dephasing of the probed intraband coherence may proceed slower than the relaxation of carriers via emission of LO-phonons estimated to occur on a 200-fs time scale as in bulk GaAs.1 To corroborate this interpretation, the unknown LO-phonon emission times in the superlattices must be measured for the experimental conditions of the THz-emission experiments. In this paper, a combined investigation of the coherent and incoherent dynamics of optically excited charge carriers in a superlattice structure is presented. A comparison of the characteristic time constants provides clear evidence for the conservation of the phase of the intraband coherence on LO-phonon relaxation. Optical Society of America 1997 info:eu-repo/semantics/conferenceObject doc-type:conferenceObject text http://purl.org/coar/resource_type/c_5794 https://ris.uni-paderborn.de/record/44275 Meier T, Wolter F, Roskos HG, et al. Conservation of intraband coherence upon carrier relaxation by LO-phonon emission. In: <i>Quantum Electronics and Laser Science Conference</i>. Optical Society of America; 1997. eng info:eu-repo/semantics/altIdentifier/isbn/1-55752-501-3 info:eu-repo/semantics/closedAccess