Biexciton luminescence in InAs nanorods

The binding energy of a biexciton confined in InAs nanorods is calculated using the potential morphing method. Once the system under investigation is in a crossover state, the spectral shapes of the exciton and biexciton photoluminescence were predicted. Our results indicate that for the decreasing length of the nanorod, the emission peaks of exciton and biexciton shift to higher energies. Moreover the energy separation between the exciton and biexciton emission peaks shows a maximum at a characteristic length around 24 nm. Finally, we have confirmed that, as it is expected, the emission peaks shift to higher energies and the energy separation between them decreases for decreasing temperature. (c) 2005 American Institute of Physics.