Abstract
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 language | English |
|---|---|
| Pages (from-to) | 234-238 |
| Number of pages | 5 |
| Journal | Chemistry of Materials |
| Volume | 6 |
| Issue number | 2 |
| Publication status | Published - 1994 Dec 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)