Second-order nonlinear optical effects in novel polymethacrylates containing a molecular-ionic chromophore in the side chain

Dong Hoon Choi, W. M K P Wijekoon, H. M. Kim, P. N. Prasad

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We have synthesized new glassy methacrylate polymers containing a molecular-ionic (N-methylpyridinium) nonlinear optical chromophore in the side chain. A bulky tetraphenylborate (TPB) counterion was substituted at the salt unit in order to reduce the migration of the counterion during the process of poling. It was found that the poling-induced chromophore alignment of the TPB-containing polymer is significantly improved compared to that of the iodide or bromide containing polymers. The second-order nonlinear optical susceptibility, χ(2)(-2ω;ω,ω), of the poled TPB-containing polymer is approximately 5 times larger than that of the corresponding iodide analogue. Also, the temporal stability of the poled structure of the TPB-containing polymer is found to be considerably improved over that of the analogous iodide containing polymer.

Original languageEnglish
Pages (from-to)234-238
Number of pages5
JournalChemistry of Materials
Issue number2
Publication statusPublished - 1994 Dec 1
Externally publishedYes


ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

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