We have studied femtosecond pulse propagation in CdS quantum-dot-doped waveguides produced by the solgel and ion-exhange methods. The observed two-photon absorption and asymmetric spectral modulation of the transmitted pulses are explained by our theoretical model, which incorporates a near-resonant two-photon transition.
© 1996 Optical Society of America
P. T. Guerreiro, S. G. Lee, A. S. Rodrigues, Y. Z. Hu, E. M. Wright, S. I. Najafi, J. Mackenzie, and N. Peyghambarian, "Femtosecond pulse propagation near a two-photon transition in a semiconductor quantum-dot waveguide," Opt. Lett. 21, 659-661 (1996)