No abstract

No abstract

We demonstrate optical limiting for the C(60) fullerene in polymethyl methacrylate (PMMA) as a solid polymer host. It is shown that the optical-limiting behavior is consistent with excited-state absorption (reverse saturable absorption) as a mechanism. We suggest that a higher threshold for optical limiting compared with that of C(60) in toluene is due to nonlinear scattering for the liquid. The performance of C(60) in PMMA is compared with that in chloroaluminum phthalocyanine, N-methylthioacridone, King's complex, and ruthenium King's complex in PMMA. Optical damage thresholds are reported.

No abstract

We report a new family of organometallic compounds that exhibit optical limiting through reverse saturable absorption. The optical limiting properties of the metal cluster compounds HFeCo(3)(CO)(12), [NEt(4)](+)FeCo(3)(CO)(12),(-) HFeCo(3)(CO)(10)(PMe(3))(2) and HFeCo(3)(CO)(10)(P(C(6)H(5))(3))(2) were measured at 532 nm using 8-nsec pulses. Pulse narrowing from 8 to 4 nsec was observed. The data indicate that the optical-limiting properties are essentially independent of the type of counter ion substituted in the compound but dependent on the ligand-type substitution.