A very strong (~10-8 esu) femtosecond cubic nonlinearity in metallic indium that increased sharply in magnitude as the temperature approached the melting point was observed.
© 1997 Optical Society of America
S. Dhanjal, S. V. Popov, I. R. Shatwell, Yu.P. Svirko, N. I. Zheludev, and V. E. Gusev, "Femtosecond optical nonlinearity of metallic indium across the solid liquid transition," Opt. Lett. 22, 1879-1881 (1997)