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Olbricht BC, Sullivan PA, Dennis PC, et al. Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced absorption spectroscopy (VAPRAS). J Phys Chem B. 2010;115(2):231-41doi: 10.1021/jp107995t.
Olbricht, B. C., Sullivan, P. A., Dennis, P. C., Hurst, J. T., Johnson, L. E., Benight, S. J., Davies, J. A., Chen, A., Eichinger, B. E., Reid, P. J., Dalton, L. R., & Robinson, B. H. (2011). Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced absorption spectroscopy (VAPRAS). The journal of physical chemistry. B, 115(2), 231-41. https://doi.org/10.1021/jp107995t
Olbricht, Benjamin C, et al. "Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced absorption spectroscopy (VAPRAS)." The journal of physical chemistry. B vol. 115,2 (2011): 231-41. doi: https://doi.org/10.1021/jp107995t
Olbricht BC, Sullivan PA, Dennis PC, Hurst JT, Johnson LE, Benight SJ, Davies JA, Chen A, Eichinger BE, Reid PJ, Dalton LR, Robinson BH. Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced absorption spectroscopy (VAPRAS). J Phys Chem B. 2011 Jan 20;115(2):231-41. doi: 10.1021/jp107995t. Epub 2010 Dec 17. PMID: 21166390.
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J Phys Chem B. 2011 Jan 20;115(2):231-41. doi: 10.1021/jp107995t. Epub 2010 Dec 17.

Measuring order in contact-poled organic electrooptic materials with variable-angle polarization-referenced absorption spectroscopy (VAPRAS).

The journal of physical chemistry. B

Benjamin C Olbricht, Philip A Sullivan, Peter C Dennis, Jeffrey T Hurst, Lewis E Johnson, Stephanie J Benight, Joshua A Davies, Antao Chen, Bruce E Eichinger, Philip J Reid, Larry R Dalton, Bruce H Robinson

Affiliations

  1. Department of Chemistry, University of Washington, 109 Bagley Hall, Box 351700, Seattle, Washington 98195, USA.

PMID: 21166390 DOI: 10.1021/jp107995t

Abstract

Organic nonlinear electrooptical (ONLO) chromophores must be acentrically ordered for the ONLO material to have electrooptic (EO) activity. The magnitude of the order is characterized by the acentric order parameter, , where β is the major Euler angle between the main axis of the chromophore and the poling field which imposes the acentric order. The acentric order parameter, which is difficult to measure directly, is related to the centrosymmetric order parameter, defined as = ½(3-1), through the underlying statistical distribution. We have developed a method to determine centrosymmetric order of the ONLO chromophores when the order is low (i.e., < 0.1). We have extended the method (begun by Graf et al. J. Appl. Phys. 1994, 75, 3335.) based on the absorption of light to determine the centrosymmetric order parameter induced by a poling field on a thin film sample of ONLO material. We find that the order parameters, analyzed by two different methods, are similar and also consistent with theoretical estimates from modeling of the system using coarse-grained Monte Carlo statistical mechanical methods.

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