M.J. Stevens

Publications (4)0 Total impact

• Conference Proceeding: Cascaded second-harmonic coherent control of carrier density and spin in a [110]-oriented semiconductor

  X.Y. Pan, M.J. Stevens, A.L. Smirl, R D R Bhat, J E Sipe, H.M. van Driel
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  ABSTRACT: We demonstrate independent coherent control of carrier density and spin in [110]-oriented GaAs/AlGaAs quantum wells by using the phase-dependent energy transfer between ~100-fs omega and 2omega pulses, as opposed to quantum interference
  Quantum Electronics Conference, 2004. (IQEC). International; 06/2004
• Source

  Available from: utoronto.ca

  Conference Proceeding: Quantum interference control of a ballistic pure spin current in GaAs/AIGaAs quantum wells

  M.J. Stevens, A.L. Smirl, R.D.R. Bhat, J.E. Sipe, H.M. van Driel
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  ABSTRACT: We demonstrate optical injection of a spin current with no accompanying charge current in GaAs/AlGaAs quantum wells through quantum interference of one- and two-photon absorption of -100 fs phase-locked pulses with orthogonal linear polarizations.
  Quantum Electronics and Laser Science, 2003. QELS. Postconference Digest; 07/2003
• Conference Proceeding: Differential measurements of interband and intersubband coherenceand exciton-exciton correlations in quantum wells

  S.A. Hawkins, M.J. Stevens, E.J. Gansen, K. Jarasiunas, A.L. Smirl, D.G. Steel
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  ABSTRACT: A novel temporally-gated technique and standard differential detection techniques are used to study quantum beats involving the light and heavy hole excitons in GaAs quantum wells. The contributions of intravalence band coherence are separated from those of conduction-to-valence band coherence and the contributions of dynamic exciton-exciton correlations are identified by taking advantage of the polarization selection rules for the excitonic transitions
  Nonlinear Optics: Materials, Fundamentals, and Applications, 2000. Technical Digest; 02/2000
• Conference Proceeding: Coherent all-optical polarization switching in quantum wells

  E.J. Gansen, K. Jarasiunas, S.A. Hawkins, M.J. Stevens, A.L. Smirl
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  ABSTRACT: A coherent all-optical nonlinear polarization switch based on exciton-exciton correlations is demonstrated in a multiple-quantum-well semiconductor structure. A contrast ratio of 8:1 and a relaxation time of less than a picosecond are reported at 80 K using only 10 wells. The results are compared to a similar switch, which makes use of electron spin
  Nonlinear Optics: Materials, Fundamentals, and Applications, 2000. Technical Digest; 02/2000