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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Dalton, Larry R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2011Systematic nanoengineering of soft matter organic electro-optic materialscitations
- 2010Definition of critical structure/function relationships and integration issues for organic electro-optic materials
- 2010Organic electro-optic materials
- 2008Guest-host cooperativity in organic materials greatly enhances the nonlinear optical responsecitations
- 2007Theory-Guided Design and Synthesis of Multichromophore Dendrimerscitations
- 2006Theoretically-inspired rational design of electro-optic materials
- 2005Systematic Study of the Structure-Property Relationship of a Series of Ferrocenyl Nonlinear Optical Chromophorescitations
- 2004Investigation of polymers and marine-derived DNA in optoelectronicscitations
- 2001Advancements in conductive cladding materials for nonlinear optic polymer based optoelectronic devicescitations
- 2000Realization of polymeric electro-optic modulators with less than one volt drive voltage requirementcitations
Places of action
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article
Realization of polymeric electro-optic modulators with less than one volt drive voltage requirement
Abstract
The roles played by spatially anisotropic intermolecular electrostatic interactions, chromophore shape, host dielectric constant, and poling field strength in defining maximum achievable electro-optic activity for electrically poled chromophore/polymer materials are investigated by equilibrium and Monte-Carlo quantum statistical mechanical calculations. Even simple Hamiltonians reproduce critical qualitative features such as the existence of a maximum in plots of electro-optic activity versus chromophore number density in a polymer matrix. Comparison of theoretical results for various methods provides a useful check on the validity of approximations employed with individual methods. The most significant conclusion to derive from a comparison of experimental and theoretical results is the dependence of maximum achievable electro-optic activity upon chromophore shape. Theoretical calculations suggest a new paradigm for the design of optimum electro-optic chromophores; realization of the desired shapes may be facilitated by dendritic synthetic approaches. In the presence of intermolecular electrostatic interactions, the dependence of electro-optic activity upon material dielectric permittivity and electric poling field strength is more complex than in the absence of such interactions. Of particularly, interest are conditions that lead to second order phase transitions to lattices containing centrically (antiferroelectrically) ordered chromophore domains. Such phase transitions can lead to further complications in the attempted preparation of device quality materials but can be effectively avoided by utilization of theoretically derived phase diagrams.