Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 33, Issue 12, Pages E130-E142Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.33.00E130
Keywords
-
Categories
Funding
- National Science Foundation (NSF) [DMR-1408862]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1408862] Funding Source: National Science Foundation
Ask authors/readers for more resources
We report on the third-order nonlinear optical properties of a series of molecules, first published in Chem. Eur. J. 19, 12693-12704 (2013), where a donor and an acceptor group are separated by a linear conjugated system consisting of only carbon atoms building triple bonds (0 to 5 acetylene spacers). We determine how the wavelength- dependent complex third-order polarizabilities of these molecules vary with the number of acetylene spacers between donor and acceptor groups. We find that both peak two-photon absorption cross sections and off-resonant third-order polarizabilities reach a maximum for 3 spacers and that their corresponding intrinsic values decrease for longer conjugation lengths. At the same time, the observed third-order polarizabilities are two orders of magnitude larger than those seen in similar molecules of similar size but without donor-acceptor substitution. There is also a resonant enhancement of the real part of the third-order polarizability that only appears for the longer molecules, and reaches similar to 5 times the off-resonant value for a molecule with 4 spacers. This enhancement is found at the long-wavelength side of the two-photon absorption where the ratio between real and imaginary parts of the third-order polarizabilities still exceeds 10. (C) 2016 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available