@inproceedings{44290,
  abstract     = {{Summary form only given. For a proper understanding of nonlinear optical experiments in semiconductors even the low-density limit Coulomb-induced many body correlations beyond the Hartree-Fock decoupling scheme need to be considered. In the coherent X(3) limit these correlations manifest themselves in the contributions of bound and unbound two-exciton states to the optical response. The understanding of nonlinear excitonic effects in the Stark effect of semiconductors including carrier-correlations is still of fundamental interest.}},
  author       = {{Meier, Torsten and Sieh, C. and Koch, S.W. and Brick, P. and Hubner, M. and Ell, C. and Prineas, J. and Khitrova, G. and Gibbs, H.M.}},
  booktitle    = {{Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference}},
  isbn         = {{1-55752-576-X}},
  location     = {{Baltimore, MD, USA}},
  pages        = {{14--15}},
  publisher    = {{IEEE}},
  title        = {{{Influence of carrier-correlations on the optical Stark effect of semiconductors}}},
  doi          = {{10.1109/QELS.1999.807099}},
  year         = {{1992}},
}

@inproceedings{44289,
  abstract     = {{Recent experiments by Roskos et al. in ultrashort optical pulse excitation of biased coupled quantum wells have shown remarkable generation of terahertz electromagnetic radiation. Two different effects were identified: (i) an oscillatory field of frequency corresponding to the separation between the coupled levels in the quantum-well pair (~ 1.5 THz); and (ii) an “instantaneous” electromagnetic field pulse that appears to follow the time evolution of the exciting laser pulse. The oscillatory field is understood to be caused by the coherent oscillation of optically created electrons from one well to the other.[1] The “instantaneous” part we believe is caused by a new mechanism proposed in Ref. 2. The essence of this “instantaneous” mechanism is that electron-hole pairs are created in a biased semiconductor with a net polarization. The density of these pairs follows the light field, as does the induced polarization, hence, generating an electromagnetic source that follows the light pulse. Such mechanisms have been discussed before for photon energies below the optical bandgap energy,[3] although they have so far been difficult to observe. In our work, we have generalized and extended such effects to photon energies above the handgap energy. In this paper we will discuss both of these mechanisms as well as the fourwave-mixing (FWM) signal,[4] and show how they can be understood within one unified formalism. We will also show that the calculations agree well with the experimental results.}},
  author       = {{Meier, Torsten and Schulze, A. and Scmittrink, S. and Thomas, P. and Chuang, S.L.}},
  booktitle    = {{International Quantum Electronics Conference}},
  location     = {{Vienna, Austria}},
  title        = {{{Terahertz Electromagnetic Pulse Generation and Four-Wave Mixing in Coupled Quantum Wells}}},
  year         = {{1992}},
}

@inproceedings{44288,
  abstract     = {{In the presence of a homogeneous electric field, 𝐹→, each Bloch state in a crystal changes quasimomentum according to the so-called acceleration theorem Thus, in the absence of interband tunneling and scattering processes, each Bloch state moves at a constant velocity in k-space and executes a periodic motion in the reduced zone scheme by undergoing a Bragg reflection between each two traversals of the Brillouin zone.}},
  author       = {{Meier, Torsten and von Plessen, G. and Schulze, A. and Thomas, P.}},
  booktitle    = {{International Quantum Electronics Conference}},
  location     = {{Vienna, Austria}},
  title        = {{{On the Observability of Bloch Oscillations in Time-Resolved Four-Wave-Mixing}}},
  year         = {{1992}},
}