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

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

Research output: Contribution to journal › Article

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

ASJC Scopus subject areas

Materials Chemistry
Materials Science(all)

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Choi, D. H., Wijekoon, W. M. K. P., Kim, H. M., & Prasad, P. N. (1994). Second-order nonlinear optical effects in novel polymethacrylates containing a molecular-ionic chromophore in the side chain. Chemistry of Materials, 6(2), 234-238.

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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.",

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AU - Choi, Dong Hoon

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AU - Kim, H. M.

AU - Prasad, P. N.

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AB - 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.

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