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High glass transition chromophore functionalised polyimides for second-order nonlinear optical applications

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
42
Issue
8
Identifiers
DOI: 10.1016/s0032-3861(00)00761-8
Keywords
  • Polyimides
  • Nonlinear Optics
  • Stability

Abstract

Abstract Nonlinear optical (NLO) polymers with glass temperatures ( T g) as high as 291°C were prepared, PI 2-4 by covalent bonding of a chromophore to the backbone of hydroxyl polyimides via a Mitsunobu reaction, PI 1 as a donor-embedded polyimide was synthesised by polycondensation of a diaminochromophore and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride in a two-step reaction. Poled films of the polymers were measured for their second-harmonic generation (SHG) effect and showed d 33 values up to 20 pm/V. Some of the films show a stable nonlinear optical response even to 90% of remaining NLO-intensity at 125°C during 200 h.

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