Author/Authors :
Guo، نويسنده , , W.F. and Sun، نويسنده , , X.B. and Sun، نويسنده , , J. and Wang، نويسنده , , X.Q. and Zhang، نويسنده , , G.H and Ren، نويسنده , , Q. and Xu، نويسنده , , D.، نويسنده ,
Abstract :
Nonlinear optical (NLO) absorption of a metal dithiolene complex, [(C2H5)4N][Ni(dmit)2] has been studied by open-aperture (OA) Z-scan technique under irradiation with 15 ns and 1 ns laser pulses at 1053 nm and 40 ps laser pulses at 1064 nm. Distinct excited-state absorption behaviors were observed: a reverse saturable absorption (RSA) for 15 ns while a saturable absorption (SA) for 1 ns and 40 ps laser pulses, and the SA for 1 ns laser pulses was stronger than that for the latter. The mechanism responsible for the results with different laser pulses is analyzed using a five energy-level diagram.
