Pt. Guerreiro et al., FEMTOSECOND PULSE-PROPAGATION NEAR A 2-PHOTON TRANSITION IN A SEMICONDUCTOR QUANTUM-DOT WAVE-GUIDE, Optics letters, 21(9), 1996, pp. 659-661
We have studied femtosecond pulse propagation in CdS quantum-dot-doped
waveguides produced by the solgel and ion-exchange methods. The obser
ved two-photon absorption and asymmetric spectral modulation of the tr
ansmitted pulses are explained by our theoretical model, which incorpo
rates a near-resonant two-photon transition. (C) 1996 Optical Society
of America