| Title | The effect of bulky groups on the electro-optic coefficient r33 of a pyridine-donor nonlinear optical chromophore |
| Publication Type | Journal Article |
| Year of Publication | 2016 |
| Authors | Quilty, J.W., Thomas D.G., Clarke D.J., and Breukers R.D. |
| Journal | Optical Materials |
| Volume | 54 |
| Pagination | 147 - 154 |
| Date Published | 2016 |
| ISSN | 09253467 (ISSN) |
| Keywords | Chromophores, Electrooptic effects, Electrooptical devices, Ellipsometry, Host-guest polymers, Integrated optics, merocyanine, Modulation, Molecular aggregation, Polymers, Pyridine, Pyridinylidene |
| Abstract | The effect of bulky groups attached to pyridine-donor chromophores on the electro-optic coefficient r33 of host-guest polymers was measured by modulation ellipsometry. Overall, the experimental results indicated no significant beneficial effect of the bulky groups on r33. The maximum r33 achieved was just under 6 pm/V for the plain chromophore, compared with the expected 20 pm/V based on the molecular properties. Decomposition of the chromophore absorption band revealed significant aggregation, with the monomer fraction estimated to be marginally less than 1/3 for all chromophores studied. We attribute the lower achieved r33 values to increased molecular aggregation. © 2016 Elsevier B.V. All rights reserved. |
| URL | http://www.scopus.com/inward/record.url?eid=2-s2.0-84958969990&partnerID=40&md5=39088edc9e59e4e563074191c11cf8b3 |
| DOI | 10.1016/j.optmat.2016.02.028Article |
