Measurement of first hyperpolarizabilities by hyper‐Rayleigh scattering

Autor:	I. D. Morrison, M. A. Stammers, W. M. Laidlaw, R. G. Denning
Rok vydání:	1996
Předmět:	Materials science Scattering business.industry Nonlinear optics Light scattering symbols.namesake Optics Polarizability Excited state symbols Atomic physics Rayleigh scattering Luminescence Absorption (electromagnetic radiation) business Instrumentation
Zdroj:	Review of Scientific Instruments. 67:1445-1453
ISSN:	1089-7623 0034-6748
Popis:	The origin of spurious and irreproducible signals in the measurement of the hyper‐Rayleigh scattering (HRS) of solutions is investigated. A new cell design, coupled with continuous solution filtration through a 20 nm filter, is shown to improve the reproducibility of the measurement to ±5%. A transverse cell dimension of ∼2 mm reduces absorption of the second harmonic. A simple monochromaticity test is used to identify luminescence, and we recommend that it is made routinely. Scattering from the [Ru(bipy)3]2+ cation, attributed to HRS by Zyss et al. [Chem. Phys. Lett. 206, 409 (1993)], appears to be largely due to two‐photon excited luminescence. The reliability of calibration procedures is examined, and some revised hyperpolarizabilities are reported.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4365b3cd5cd1fb2479da2c8760ab91bb https://doi.org/10.1063/1.1146871 Zobrazit plný text záznamu