- Full text PDF available (1)
- This year (0)
- Last 5 years (0)
- Last 10 years (0)
A fast (Tau(response) <90 fs) free-electron spin-f lipping frequency-degenerate nonlinearity with a signif icant value of|chi((3))(xxyy)(omega,omega,omega,-omega)chi((3))(xxyy)(omega,omega,omega,-omega)|~10(-)(8)esu has been observed in bulk gold at 1260 nm by use of a new pump-probe polarization-sensitive technique.
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.