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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1995),
  • paper QThG36

Femtosecond coherent spectroscopy of bulk ZnSe and ZnCdSe/ZnSe quantum wells

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Abstract

We have found very strong nonlinear diffracted signals in femtosecond (100-fs) two- beam self-diffraction experiments on a thin (300-Å total thickness) ZnCdSe/ZnSe multiple-quantum-well (MQW) sample whose band gap is in the blue region (2.71 eV). The second harmonic of a self-mode-locked Ti:sapphire laser was tuned to the heavy- hole exciton resonance at low temperatures. Extremely-high-order nonlinear signals, up to 13th order, are visible to the naked eye at time delay T ≈ 200 fs.1

© 1995 Optical Society of America

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