| EPSRC Reference: |
GR/K21399/01 |
| Title: |
ULTRAFAST THIRD ORDER NONLINEARITIES AND PHOTOREFRACTIVE STUDIES OF ORGANIC ZWITTERION MATERIALS |
| Principal Investigator: |
Kar, Professor AK |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
Heriot-Watt University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1994 |
Ends: |
30 September 1996 |
Value (£): |
88,324
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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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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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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 |
| Summary |
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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.hw.ac.uk |