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Proceedings Paper

Highest observed second harmonic intensity from a multilayered Langmuir-Blodgett film structure
Author(s): Geoffrey J. Ashwell; Emma J.C. Dawnay; Andrzej P. Kuczynski; Philip J. Martin
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Paper Abstract

Strong second harmonic generation (SHG) has been obtained from multilayered LangmuirBlodgett (LB) films of (i) a new hemicyanine dye ENoctadecyl--4-''(4-diirtethylaminophenyl) ethenyl)pyridinium iodide interleaved with 4 4 ''dioctadecyl--3 5 3 '' 5 '' -tetramethyldipyrrylmethene hydrobrornide and (ii) an unusual irbridged donor-acceptor zwitterion Z/3(Nhexadecyl4quinolinium) acyano4styryldicyanomethanide . The SH intensity increases quadratically with the number of LB layers. For the interleaved structure the SH intensity obtained from 200 layers (Ca. 0. 5 m thick) is 18 times the signal from a monolayer of the hemicyanine dye reported by Girling et al the intensity is the highest reported for an LB film.

Paper Details

Date Published: 1 March 1991
PDF: 10 pages
Proc. SPIE 1361, Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization, (1 March 1991); doi: 10.1117/12.24423
Show Author Affiliations
Geoffrey J. Ashwell, Cranfield Institute of Technology (United Kingdom)
Emma J.C. Dawnay, Cranfield Institute of Technology (United Kingdom)
Andrzej P. Kuczynski, Cranfield Institute of Technology (United Kingdom)
Philip J. Martin, Cranfield Institute of Technology (United Kingdom)


Published in SPIE Proceedings Vol. 1361:
Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization
Manijeh Razeghi, Editor(s)

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