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Proceedings Paper

Second-harmonic generation studies of crosslinkable nonlinear optical copolymers
Author(s): Khashayer Pakbaz; Nobuhiro Kawatsuki; Hans-Werner Schmidt
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Paper Abstract

Polymethacrylate copolymers, containing non-linear optically active 4'-dialkylamino-4-nitro- azobenzene side groups and crosslinkable 2-butenyl side groups have been studied. Films of these copolymers can be thermally crosslinked at elevated temperatures and photochemically crosslinked by exposure with UV light; both methods allow the control of the crosslinking density. In situ second harmonic generation (SHG) of a Nd-YAG laser (1.064 micrometers ) while poling was used to study films with different degrees of pre-crosslinking. A pre-crosslinking step, prior to the corona poling step, can be applied to optimize alignment and relaxation of the chromophores. Depending on the conditions of pre-crosslinking, the SHG signal intensity and the alignment stability can be maximized.

Paper Details

Date Published: 23 July 1993
PDF: 9 pages
Proc. SPIE 1852, Nonlinear Optical Properties of Advanced Materials, (23 July 1993); doi: 10.1117/12.148456
Show Author Affiliations
Khashayer Pakbaz, Univ. of California/Santa Barbara (United States)
Nobuhiro Kawatsuki, Univ. of California/Santa Barbara (Japan)
Hans-Werner Schmidt, Univ. of California/Santa Barbara (Germany)

Published in SPIE Proceedings Vol. 1852:
Nonlinear Optical Properties of Advanced Materials
Shahab Etemad, Editor(s)

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