Premium
Degenerate four‐wave mixing measurements of the χ (3) non‐linear optical properties of poly(arylene‐ethynylenesilylene)s
Author(s) -
Antipov Oleg L.,
Domrachev Georgy A.,
Douglas William E.,
Guy Daniel M. H.,
Klapshina Larissa G.,
Koritin Alexey I.,
Kuzhelev Alexander S.,
Semenov Vladimir V.
Publication year - 2000
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/1099-0739(200010)14:10<640::aid-aoc52>3.0.co;2-3
Subject(s) - arylene , chemistry , polymer , silicon , chloroform , mixing (physics) , degenerate energy levels , wavelength , linearity , analytical chemistry (journal) , optoelectronics , organic chemistry , materials science , alkyl , physics , quantum mechanics , aryl
The third‐order optical non‐linearity in solution of a series of poly(arylene‐ethynylenesilylene)s containing a variety of backbone arylene groups and substituents at silicon has been studied by using the degenerate four‐wave mixing technique at 1064 nm with a 6 ns pulse duration. Thermal grating effects may be neglected under the experimental set‐ups employed. The results obtained are greater by more than two orders of magnitude than those previously measured for some of the polymers using the Z ‐scan technique at the same wavelength. The electronic contribution to the fast non‐linearity is greater than the nuclear (orientational) contribution by a factor of at least 4. The presence of a single 8‐(dimethylamino)naphthyl ligand at silicon affording pentacoordination has a beneficial effect on the χ (3) properties. The high χ (3) properties of the polymers (e.g. |Re(χ (3) )| = 9.5 × 10 −12 esu for [C≡CSiPh 2 C≡C − (1,4 − C 6 H 4 )] n in chloroform [5 g l −1 ]) confirm the presence of extensive through‐Si conjugation along the backbone. Copyright © 2000 John Wiley & Sons, Ltd.