| EPSRC Reference: |
GR/K21382/01 |
| Title: |
ULTRAFAST THIRD-ORDER NON-LINEARITIES AND PHOTOREFRACTIVE STUDIES OF ORGANIC ZWITTERION MATERIALS |
| Principal Investigator: |
Cross, Dr GH |
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| Department: |
Physics |
| Organisation: |
Durham, University of |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1994 |
Ends: |
30 September 1996 |
Value (£): |
8,001
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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The Zwitterion materials DEMI and its analogues are currently synthesised at the University of Durham and have demonstrated high dipole-moments and hyperpolarizabilities. The ultrafast third-order non-linearity of organic materials has been shown to increase approximately linearly with the second order non-linearity in donor-pi-acceptor molecules, which makes DEMI series specially attractive since the off-resonance second order hyperpolarizability is among the largest of those measured. We shall use subpicosecond laser techniques to make a comparative study. The same material may be doped easily into polymer films to produce photorefractive materials, which property we shall also study for a range of laser-pulse timescales. The main advantage in using DEMI and its analogues in the latter application area is that large in plane electro-optic coefficients are available for use. This is vital in demonstrating devices of practical value.
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Key Findings |
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Potential use in non-academic contexts |
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Impacts |
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| Description |
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| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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