Third-order susceptibilities of asymmetric pentaazadentate porphyrin-like metal complexes

Citation
Wf. Sun et al., Third-order susceptibilities of asymmetric pentaazadentate porphyrin-like metal complexes, APPL PHYS L, 74(22), 1999, pp. 3254-3256
Citations number
19
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
74
Issue
22
Year of publication
1999
Pages
3254 - 3256
Database
ISI
SICI code
0003-6951(19990531)74:22<3254:TSOAPP>2.0.ZU;2-3
Abstract
The third-order nonlinear optical properties of a series of asymmetric pent aazadentate porphyrin-like metal complexes ([(R-APPC)M]Cl-n) with different conjugated R groups and metal centers have been investigated by degenerate four wave mixing experiments using 40 ps laser pulses at 532 nm. The molec ular second-order hyperpolarizabilities (gamma) for these complexes range f rom 1.1X10(-31) to 1.2X10(-30) esu and depend strongly on both the nature o f the metal and the R group. The gamma values of the [(R-APPC)Cd]Cl complex es are 2-7 times larger than those of PbPc(CP)(4) and SiNc, two of the most promising nonlinear optical materials for optical limiting applications. M easurements of the individual components of the chi((3)) tensor indicate th at the nonlinearity is predominantly electronic in origin when 40 ps laser pulses are used. (C) 1999 American Institute of Physics. [S0003-6951(99)020 22-7].