Abstract
The optical limiting performances of nine asymmetric pentaazadentate porphyrin-like metal complexes ([(R-APPC)M]Cln) have been measured at 532nm with nanosecond pulses. In a f/38 geometry, with sample transmission of 0.51 ∼ 0.80 in a 2 mm cell, the limiting thresholds for these complexes were 1.4 ∼ 150.0 mJ/cm2. The throughputs of these complexes were limited to 0.31 ∼ 1.42 J/cm2 for incident fluences as high as 3.5 J/cm2. The limiting throughput was strongly influenced by the nature of the ligand and metal ions. Lower bounds for the ratio of triplet excited-state to ground state absorption cross sections have been estimated at 2.3 ∼ 5.7. The lower limiting thresholds, lower limiting throughputs, as well as the ease of modification of the ligands and variation of the metal ions, make these complexes promising candidates for optical power limiters.
Original language | English |
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Pages (from-to) | 127-134 |
Number of pages | 8 |
Journal | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 3472 |
DOIs | |
State | Published - 1998 |
Event | Nonlineair Optical Liquids for Power Limiting and Imaging - San Diego, CA, United States Duration: 22 Jul 1998 → 22 Jul 1998 |
Keywords
- Absorption cross section
- Asymmetric pentaazadentate porphyrin-like metal complexes
- Limiting threshold
- Limiting throughput
- Optical limiting
- Reverse saturable absorption (RSA)
- Triplet excited-state