| Staff Details | ||||
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| Personal Information | ||
| Name | Lunney, James Gerard | |
| Main Department | Physics | |
| College Title | Professor | |
| james.lunney@tcd.ie | ||
| College Tel | +353 1 896 1259 | |
| Web | http://people.tcd.ie/jlunney | |
| Biography | |
| Born 23rd of June 1953, in Fermanagh, in Northern Ireland. | |
| Membership of Professional Institutions, Associations, Societies |
| Details | Date From | Date To |
| Member of Optical Society of America | ||
| Fellow of the Institute of Physics |
| Awards and Honours | |
| Award | Date |
| Elected Fellow of Trinity College | 1992 |
| Elected Fellow of the Institute of Physics | 1993 |
| Languages |
| Language | Skill Reading | Skill Writing | Skill Speaking |
| English | Fluent | Fluent | Fluent |
| French | Basic | Basic | Basic |
| Description of Research Interests |
| My research in physics has been mainly focussed on the interaction of high power lasers with materials. During my Ph. D studies at the Rutherford Laboratory I used very large and powerful lasers to heat materials to very high temperature for laser fusion studies and X-ray laser development. I made some of the first X-ray spectroscopic measurements on laser imploded micro-balloons and observed for the first time density-dependent dielectronic satellite line emission. On joining the Department of Physics at Trinity College I was able to continue some of this work on plasma spectroscopy, and I applied some of these techniques to dense Z-pinch plasma experiments at Imperial College, London. I also published 4 important papers on: • a new pumping scheme for an X-ray laser, • a new spectroscopic method for diagnosing high density plasmas, • time-resolved X-ray diffraction from laser heated crystals, and • a method for wave-guiding in X-ray laser experiments, which has been demonstrated in large laser laboratories in US and Japan In 1986 I established a new programme of research on laser processing of materials at Trinity College. Together with my research students, we have made contributions on a number of topics in this field: • laser ablative etching of polymers and inorganic materials, • laser glazing of metallic alloys, • laser chemical vapour deposition, and • pulsed laser deposition of thin films. We were the first group in Ireland to use the pulsed laser deposition (PLD) to make thin films. PLD is a highly flexible technique for the preparation of complex materials for research. We have used the technique to make thin films of a wide range of superconducting, magnetic, semiconducting and metallic materials for several EU and nationally-funded projects with Prof. Coey and Prof. Blau. We have also shown that it is possible to use PLD to make ultra-thin multilayer films for the fabrication of multilayer mirrors and magneto-resistive devices. My group has made significant contributions on the physics of the laser ablation process. In particular, we have made important contributions to the study of laser ablation plasmas using Langmuir probes. Using these probes we have shown that in PLD the ablated vapour is substantially ionised because of strong absorption of the laser in that material. We have also been able to validate the use of adiabatic isentropic models for describing the plasma expansion. This work has benefited from a strong collaboration with Prof J. Schou at Risoe National Laboratory in Denmark We have used PLD can to prepare films wide-bandgap semiconductors such as GaN and ZnO. Some of this work has been done in collaboration with researchers at Dublin City University. We are now exploring the potential of doping these materials to semiconducting thin films that are ferromagnetic at room temperature. Such materials may prove to be important in the emerging field of spin electronics. I also have a continuing interest in finding new applications for laser ablation, such as using it to provide the gas load for pulsed discharge plasma creation schemes. In this context I was partner in an EU-funded TMR contract on in capillary discharges for pulsed X-ray sources. |
| Research Interests | |||
| 2-PHASE MAGNETS | ABLATION | ABLATION DEPOSITION | ALUMINUM PLASMAS |
| AMBIENT OXYGEN | ANGULAR-DISTRIBUTIONS | Applied physics | BARIUM FERRITE |
| BEHAVIOR | BI2SR2CACU2O8 | BIPOLARONIC SUPERCONDUCTIVITY | BLUE |
| CATHOLUMINESCENCE IMAGING | CD1-XMNXTE | CDTE | COEFFICIENTS |
| COPPER | CRYSTAL | DEFECT STRUCTURE | DENSITY |
| DEPENDENCE | DEPOSITION | DIFFUSIVE LIGHT SCATTERING | DILUTED MAGNETIC SEMICONDUCTORS |
| DISTRIBUTED-BRAGG-REFLECTOR | DOPED LAMNO3 | DYNAMICS | EMISSION |
| EPITAXIAL ND0.7SR0.3MNO3-DELTA | EPITAXY | EUV SPECTROSCOPY | EVAPORATION |
| FERRITE THIN-FILMS | FILM LAYERED STRUCTURES | FILMS | FOAMS |
| GAAS | GALLIUM NITRIDE | GAN | GAS-PRESSURE |
| GIANT MAGNETORESISTANCE | GROWTH | HALF-METALLIC FERROMAGNET | IMPACT |
| ION EMISSION | LA0.7SR0.3MNO3 | LASER ABLATION | LASER-PLASMA INTERACTION |
| LAYERS | LOCALIZATION | LUMINESCENCE | Laser technology |
| MAGNETORESISTANCE | MANGANITES | METALLIC MULTILAYERS | NANOWIRE FORMATION |
| OXIDE SUPERCONDUCTOR | Optical materials | Optics | PERPENDICULAR MAGNETIC-ANISOTROPY |
| PHOTOABLATION | PHOTOLUMINESCENCE SPECTROSCOPY | PLASMA DIAGNOSTICS | PLASMAS |
| POINT CONTACTS | POLYMER ABLATION | PULSED LASER DEPOSITION | PULSES |
| QUANTUM-WELL | RADIATION | RECORDING MEDIA | REFRACTIVE-INDEX |
| RESISTANCE | RESISTIVITY | SCANNING ELECTRON MICROSCOPY | SR |
| SUPERLATTICES | SURFACES | SYSTEM | THIN FILMS - FERROMAGNETIC |
| THIN-FILMS | TRANSITION | ULTRAVIOLET | VACUUM |
| WIRES | X-RAY LASER | YBCO THIN-FILMS | YIELD |
| Publications and Other Research Outputs |
| Peer Reviewed |
| CA Smyth, I Mirza, JG Lunney and EM McCabe, Surface-Enhanced Raman Spectroscopy (SERS) using Ag nanoparticle films produced by Pulsed Laser deposition (PLD), Journal of Surface Science, 264, 2013, 31-35 DOI |
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| G. O’Connell, I. Tobin and J. G. Lunney, Early stage optical emission in nanosecond laser ablation, Applied Physics A, 110, 2013, p731 – 734 Notes: [ ] DOI |
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| [B. Toftmann, B. Doggett, C. Budtz-Jorgensen, J. Schou and J. G. Lunney, Femtosecond ultraviolet laser ablation of silver and comparison with nanosecond ablation, Journal of Applied Physics, 113, 2013, p083304 -1–7 DOI |
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| Smyth, C.A., Mirza, I., Lunney, J.G., McCabe, E.M., Surface-enhanced Raman spectroscopy of pterins, Progress in Biomedical Optics and Imaging - Proceedings of SPIE , 8234, 2012, p82341G Notes: [ ] DOI |
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| D. O’Dwyer, C. F. Phelan, Y. Rakovich, P. R. Easthan, J. G. Lunney and J. F. Donegan, The creation and annihilation of optical vortices using cascade conical diffraction, Optics Express, 19, (3), 2011, p2580 – 2588 Url TARA - Full Text DOI |
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| D. O'Dwyer, C. F. Phelan, K. E. Ballantine, Y. Rakovich, J. G. Lunney and J. F. Donegan, Conical diffraction of linearly polarised light controls the angular position of a microscopic object, Optics Express, 18, (26), 2010, p27319 – 27326 Url TARA - Full Text DOI |
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| More Publications and Other Research Outputs >>> | |
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