Ultrafast Degenerate Transient Lens Spectroscopy in Semiconductor NanosctructuresA.V. Leontyev, D.K. Zharkov, A.G. Shmelev, V.G. Nikiforov and V.S. LobkovEPJ Web of Conferences, 103 (2015) 07002DOI: https://doi.org/10.1051/epjconf/201510307002