Nonlinear absorption of new mesoionic compounds

The nonlinear absorption of new mesoionic compounds (MIC) was investigated using nanosecond laser pulses with wavelengths at 570, 605 and 618 nm. Nonlinear absorption cross-sections, σ 2 ≈ 10 −45 cm 4 s/photon, larger than any recorded in the literature, were obtained due to the introduction of p-CF...

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Bibliographic Details
Published in:	Optics communications Vol. 264; no. 1; pp. 225 - 228
Main Authors:	Pilla, V., de Araújo, Cid B., Lira, B.F., Simas, A.M., Miller, J., Athayde-Filho, P.F.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 01-08-2006 Elsevier Science
Subjects:	Exact sciences and technology Fundamental areas of phenomenology (including applications) Nonlinear optics Optical materials Optical susceptibility, hyperpolarizability Optics Physics Polymers and organics Optical materials Nonlinear absorption Pulsed lasers Organic compounds ns range Photonics
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Summary:	The nonlinear absorption of new mesoionic compounds (MIC) was investigated using nanosecond laser pulses with wavelengths at 570, 605 and 618 nm. Nonlinear absorption cross-sections, σ 2 ≈ 10 −45 cm 4 s/photon, larger than any recorded in the literature, were obtained due to the introduction of p-CF 3–C 6H 4 electron-acceptor and p-CH 3–C 6H 4 or p-CH(CH 3) 2–C 6H 4 electron-donor groups in the MIC ring. The large values of σ 2, the ease of synthesis of these compounds and their marked stability, make them promising candidates for photonic applications.
ISSN:	0030-4018 1873-0310
DOI:	10.1016/j.optcom.2006.02.012