Octupolar Films with Large Second Harmonic Generation and Electro-Optical Effects
- Authors
- Jeong, Mi-Yun; Brasselet, Sophie; Lim, Tong-Kun; Cho, Bong Rae
- Issue Date
- 22-2월-2012
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- octupolar films; second harmonic generation; electro-optical effects; metal-enhanced effects
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.22, no.4, pp.788 - 796
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 22
- Number
- 4
- Start Page
- 788
- End Page
- 796
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/105451
- DOI
- 10.1002/adfm.201102257
- ISSN
- 1616-301X
- Abstract
- Thin films that benefit from efficient octupolar molecular packing are prepared for second harmonic generation (SHG) and electro-optic (EO) applications. The films are composed of 1,3,5-tricyano-2, 4,6-tris(p-diethylaminostyryl)benzene (TTB) in a ploymethylmetacrylate (PMMA) matrix on aluminum/BK7 glass (Al/BK7) and polyimide/indium tin oxide (PI/ITO) substrates. Octupolar films prepared on both substrates display polycrystalline and cylindrical domains. The molecular orientation, SHG efficiencies, and EO coefficients of the crystalline domains are measured. In the cylinders, the molecular crystal planes are oriented perpendicularly to the major cylinder axis, whereas in the polycrystals, the planes are randomly oriented. While both structures exhibit high and stable SHG and EO efficiencies, the cylinders, in particular, exhibited a very large SHG, a large EO coefficient, and high thermal stability; these characteristics will be useful in second order nonlinear optical applications.
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Collections - College of Science > Department of Chemistry > 1. Journal Articles
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