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Nondegenerate two-photon absorption in GaAs/AlGaAs multiple quantum well waveguides

zed normal and tangential to the quantum well plane. The results are compared to perturbative calculations of transition rates between states determined by the k.p method with an 8- or 14-band basis.We present femtosecond pump-probe measurements of the nondegenerate (1960−nm excitation and 1176–1326−nm probe) two-photon absorption spectra quantum well waveguides. Experiments were performed with light pulses copolari

We find excellent agreement between theory and experiment for normal polarization, then use the model to support predictions of orders-of-magnitude enhancement of nondegenerate two-photon absorption as one constituent photon energy nears an intersubband resonance.

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Simon-Pierre GORZA Tel.: +32 (0)2 650 28 02 simon.pierre.gorza@ulb.be Ecole polytechnique de Bruxelles
Campus du Solbosch - CP 194/05
Avenue F.D. Roosevelt, 50
1050 Bruxelles

N. Cox, J. Wei, H. Pattanaik, T. Tabbakh, D. Hagan, and E. W. Van Stryland, Phys. Rev. Research 2, 013376 (2020). DOI

Updated on November 3, 2021