| EPSRC Reference: |
GR/J38581/01 |
| Title: |
SYNTHESIS AND ASSESSMENT OF NEW MATERIALS WITH FREQUENCY DEPENDANT DI- ELECTRICS AXES FOR NON-LINEAR OPTICS |
| Principal Investigator: |
Wallis, Professor JD |
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| Department: |
Chemistry |
| Organisation: |
University of Kent |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
27 January 1994 |
Ends: |
26 April 1996 |
Value (£): |
90,105
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| EPSRC Research Topic Classifications: |
| Materials Synthesis & Growth |
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Summary on Grant Application Form |
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Large, single crystals of (-)-2-(-methylbenzylamino)-5-nitropyridine, (MBANP), are extremely efficient frequency doublers. This compound has the property, unique amongst efficient non-linear optical organics studied so far, that its dielectric axes rotate with respect to the crystallographic axes as a function of frequency. Recent work indicates that this property invalidates Kleinman symmetry and possibly also the Zyss-Oudar theory relating the molecular hyperpolarisability to the non-linear susceptibility of the crystal. The present proposal is to synthesise 8 methyl substituted derivatives of MBANP, such that this small structural perturbation will most probably retain this unusual property of the dielectric axes (which is a consequence of the three-dimensional structure of the molecule) while varying the crystal packing geometry enough to test the Zyss-Oudar theory in this type of material. If the Zyss-Oudar theory does require modification, it follows that current methods of finding non-critical phase-matching and optimum OPO orientations are seriously wrong and the performance of these materials is being significantly underestimated!
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Key Findings |
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.kent.ac.uk |