| EPSRC Reference: |
GR/M50171/01 |
| Title: |
LASER-DRIVEN SCANNING TUNNELLING MICROSCOPY |
| Principal Investigator: |
Frey, Professor JG |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Chemistry |
| Organisation: |
University of Southampton |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1999 |
Ends: |
31 March 2003 |
Value (£): |
462,021
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| EPSRC Research Topic Classifications: |
| Instrumentation Eng. & Dev. |
Lasers & Optics |
| Surfaces & Interfaces |
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| EPSRC Industrial Sector Classifications: |
| Chemicals |
Electronics |
| Pharmaceuticals and Biotechnology |
No relevance to Underpinning Sectors |
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| Panel History: |
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Summary on Grant Application Form |
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The project aims to develop several techniques of laser-driven scanning tunnelling microscopy. Previous studies have shown that surface vibrational modes show coupling to the tunnelling process, measured by the I-V characteristic of an STM, and also that non-linearities in the tunnelling junction can be used for optical frequency mixing. The combination of these two processes in the presence of a vibrational resonance of a surface species can be used to record surface vibrational spectra at atomic and molecular spatial resolution on surfaces. The non-linearity of the STM junction will be used to rectify and mix optical beams from a tunable IR laser system, detecting the resultant signals either through the STM tip or via the radiated RF energy.The ability to record spectra from the surface provides a radically different method of controlling the imaging in STM. In conventional STM the relationship between the image and the surface structure is complex. The recording of images at different laser wavelengths provides a much more definitive way to relate surface features to the underlying molecular or atomic constituents via, for example, the vibrational spectrum.
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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.soton.ac.uk |