Michelini, F.Staehli, J.L.Deveaud, B.Savona, V.Toquant, J.Wang, X.L.Ogura, M.Feltrin, A.2009-09-222009-09-222009-09-22200510.1103/PhysRevLett.95.177404https://infoscience.epfl.ch/handle/20.500.14299/42812WOS:000232724400071We study exciton and biexciton spectra in disordered semiconductor quantum wires by means of nanophotoluminescence spectroscopy. We demonstrate a close link between the exciton localization length along the wire and the occurrence of a biexciton spectral line. The biexciton signature appears only if the corresponding exciton state extends over more than a few tens of nanometers. We also measure a nonmonotonous variation of the biexciton binding energy with decreasing exciton localization length. This behavior is quantitatively well reproduced by the solution of the single-band Schrodinger equation of the four-particle problem in a one-dimensional confining potential.Dimensional BiexcitonsEmissionWellstext::journal::journal article::research article