Highest observed second harmonic intensity from a multilayered Langmuir-Blodgett film structure

Geoffrey J. Ashwell; Emma J.C. Dawnay; Andrzej P. Kuczynski; Philip J. Martin

doi:10.1117/12.24423

1 March 1991 Highest observed second harmonic intensity from a multilayered Langmuir-Blodgett film structure

Geoffrey J. Ashwell, Emma J.C. Dawnay, Andrzej P. Kuczynski, Philip J. Martin

Proceedings Volume 1361, Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization; (1991) https://doi.org/10.1117/12.24423
Event: Physical Concepts of Materials for Novel Optoelectronic Device Applications, 1990, Aachen, Germany

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.

Citation Download Citation

Geoffrey J. Ashwell, Emma J.C. Dawnay, Andrzej P. Kuczynski, and Philip J. Martin "Highest observed second harmonic intensity from a multilayered Langmuir-Blodgett film structure", Proc. SPIE 1361, Physical Concepts of Materials for Novel Optoelectronic Device Applications I: Materials Growth and Characterization, (1 March 1991); https://doi.org/10.1117/12.24423

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