Relaxation studies of thin films oriented by corona poling for a poly(p-phenyleneterephthalate) with nonlinear optical side groups

Autor:	Jung-Woo Lee, O-Pil Kwon, Young-Hee Won, Suck-Hyun Lee, Chong-Ha Lee
Rok vydání:	1999
Předmět:	Materials science Physics and Astronomy (miscellaneous) Condensed matter physics business.industry Relaxation (NMR) Chromophore Corona poling Polyester Optics Thin film Anisotropy Glass transition Pendant group business
Zdroj:	Applied Physics Letters. 74:2067-2069
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.123759
Popis:	We report relaxation studies of corona-poled aromatic polyester bearing a nonlinear optical (NLO) chromophore as a side group. The effects of film thickness on the temporal stability of the NLO coefficient and atomic force microscope observation of corona-poling-induced film surface roughening are presented. The results indicated that this material exhibits exceptionally good temporal stability of the second-harmonic generation coefficient at room temperature even though its glass transition temperature, Tg is quite low. The temporal stability of the chromophore orientation seems to result from the coupling between the chromophore and its anisotropic surface domain environment. Thus, the design strategies to lock the domain itself would be valuable for improving geometrically long-term stability of second-order NLO properties.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e51991c7dba6c99ab413dbb3952e8f02 https://doi.org/10.1063/1.123759 Zobrazit plný text záznamu