Prof Graham Smith

Professor

Phone: +44 (0)1334 46 2669
Email: gms@st-andrews.ac.uk

Research areas

Characterising charge carriers and traps in organic semiconductors using ESR. (Electron Spin Resonance)

High Magnetic Field Electron Spin Resonance. This is an enabling technique in the study of paramagnetic systems (transition metal ions, free radicals, defects) in materials science and structural biology offering higher resolution, higher sensitivity and higher energy quanta. At St.Andrews we have used the expertise within the millimetre wave and magnetic resonance groups to construct a highly sensitive quasi-optical spectrometer that works from 80 to 300GHz in magnetic fields up to 12T at cryogenic temperatures. This spectrometer has state of the art sensitivity and is now a UK EPSRC facility and part of a European network on High Field ESR Instrumentation and research. The spectrometer has also been commercialised and several versions are now being used at leading laboratories around the world

High Field Ferromagnetic Resonance. This is the study of ferromagnetic resonance in very high magnetic fields and uses the same type of spectrometer as for high field ESR measurements. Multi-frequency measurements in high fields allow anisotropy fields and damping terms to be calculated which are important parameters in the characterisation of magnetic storage media. The extra sensitivity available with the high field spectrometer has allowed very thin films to be characterised under conditions of full saturation and is very much an enabling technique

Magnetic Resonance Force Microscopy (MRFM). This is a new technique that combines the spatial resolution of scanning probe microscopy with the chemical specifity associated with electron spin resonance. The magnetic resonance group is currently constructing a probe that works in high magnetic fields, low temperatures and in vacuum and should have a spatial resolution of around 10nm. Initial experiments have been very promising and point to the to the possibility of single spin sensitivity. If this can be achieved there are major applications in surface chemistry, ferromagnetic systems, semiconductor characterisation and structural biology.

For further information, see the High Field ESR web-site.

Selected publications

Flexible holographic metasurfaces for shape dependent imaging and curvature sensing
Xiao, J., Plaskocinski, T., Hunter, R. I., Biabanifard, M., Robertson, D. A., Smith, G. M., Horsley, S., Schulz, S. A. & Di Falco, A., 10 Jun 2024, Metamaterials XIV. MacDonald, K. F., Staude, I. & Zayats, A. V. (eds.). SPIE, 1299005. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 12990).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open access

Design of the elusive proteinaceous oxygen donor copper site suggests a promising future for copper for MRI contrast agents
Shah, A., Taylor, M. J., Molinaro, G., Anbu, S., Verdu, M., Jennings, L., Mikulska, I., Diaz-Moreno, S., El Mkami, H., Smith, G. M., Britton, M. M., Lovett, J. E. & Peacock, A. F. A., 4 Jul 2023, In: Proceedings of the National Academy of Sciences of the United States of America. 120, 27, e2219036120.
Research output: Contribution to journal › Article › peer-review
Open access

Large cross-effect dynamic nuclear polarisation enhancements with kilowatt inverting chirped pulses at 94 GHz
Zhao, Y., El Mkami, H., Hunter, R. I., Casano, G., Ouari, O. & Smith, G. M., 22 Aug 2023, In: Communications Chemistry. 6, 12 p., 171.
Research output: Contribution to journal › Article › peer-review
Mechanically Tunable Conformable Holographic Metasurfaces
Xiao, J., Hunter, R. I., Robertson, D. A., Smith, G. M., Horsley, S., Schulz, S. A. & Di Falco, A., 4 Sept 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. Institute of Electrical and Electronics Engineers Inc., (2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open access

Shape dependent conformable holographic metasurfaces
Xiao, J., Hunter, R. I., Robertson, D. A., Smith, G. M., Horsley, S., Schulz, S. A. & Di Falco, A., 25 May 2023, In: Advanced Materials Technologies. 8, 10, 8 p., 2202006.
Research output: Contribution to journal › Article › peer-review
Shape-multiplexed conformable holographic metasurfaces
Schulz, S. A., Xiao, J., Hunter, R. I., Robertson, D. A., Smith, G. M., Horsley, S. & Di Falco, A., 2023, 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023. p. 394-395 2 p. (International Conference on Metamaterials, Photonic Crystals and Plasmonics).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Quasi-optical output for a high gain, broadband W-band amplifier
Donaldson, C. R., Smith, G. M., Robertson, D. A., Robertson, C. W., Zhang, L., MacInnes, P. & Whyte, C. G., 26 Sept 2022, IRMMW-THz 2022 - 47th International Conference on Infrared, Millimeter and Terahertz Waves. IEEE Computer Society, (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; vol. 2022-August).
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Open access

Wideband corrugated feedhorns, for radar, communications, radiometry and quasi-optics
Sung, D., Thomsen, N., Macpherson, S., Hunter, R. I., Rahman, S., Robertson, D. A., Wylde, R. J. & Smith, G. M., 29 Aug 2022, In: IEEE Open Journal of Antennas and Propagation. 3, p. 970 - 983 14 p., 9849676.
Research output: Contribution to journal › Article › peer-review
Open access

Orientation selection in high-field RIDME and PELDOR experiments involving low-spin Co^II ions
Giannoulis, A., Motion, C. L., Oranges, M., Buehl, M., Smith, G. M. & Bode, B. E., 28 Jan 2018, In: Physical Chemistry Chemical Physics. 20, 4, p. 2151-2154
Research output: Contribution to journal › Article › peer-review
Open access

An output coupler for a W-band high power wideband gyro-amplifier
McElhinney, P., Donaldson, C., McKay, J. E., Zhang, L., Robertson, D. A., Hunter, R. I., Smith, G. M., He, W. & Cross, A., Apr 2017, In: IEEE Transactions on Electron Devices. 64, 4, 4 p., 7857760.
Research output: Contribution to journal › Article › peer-review

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