Two-photon absorption in low-dimensional heterostructures R. CINGOLANI, M. LEPORE, R. TOMMASI, I.M. CATALANO, H. LAGE, D. HEITMANN et K. PLOOG Le Journal de Physique IV, 03 C5 (1993) C5-131-C5-138 DOI: 10.1051/jp4:1993523