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This page describes some of the work I am doing in plasmonics. This is the study of the excitations of the conduction electrons that occur on the surfaces of metals. My particular interest is localized surface plasmon resonances that can be excited by light on metallic nanostructures. Localized surface plasmon resonances provide a means by which light energy can be captured, manipulated and re-emitted. Using metal nanostructures allows us to do this at the nanoscale, where the dimensions are much smaller than the wavelength of light. The possibilities for new technology are boundless. My key contribution to plasmonics is a simple method for understanding the interactions between localized surface plasmons. This method allows us to design plasmonic circuits, just as you would electrical circuits. The main difference is that plasmonic circuits are powered by light. At CSIRO Materials Science and Engineering I have a small team that is studying the properties of surface plasmons for a range of applications including sensing, solar-energy conversion and ultra-high speed electronics. For official information on CSIRO activities, go to the CSIRO web site. The fabrication of metallic nanostructures requires complex and expensive equipment. Currently I hold a position as a Technology Fellow at the Melbourne Centre for Nanofabrication. This is a state-of-the-art clean room facility with amazing capabilities. We can engineer nanoscale structures down to a few nanometres, which is about 20 to 100 atoms wide. Click on the images on the right for more information ... |
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An introduction to surface plasmons. |
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What are localized surface plasmon resonances (LSPR)? |
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A simple tutorial on designing coupled plasmonic systems. |
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Resonant systems and Fano resonances. |
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Interaction of plasmonic nanostructures with substrates. |
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Plasmonic nanoparticles and Surface Enhanced Raman Scattering (SERS). |
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Plasmonic circuits - the optical Wheatstone bridge. |
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A hand-held surface plasmon resonance biosensor. |
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Coupling plasmons with semiconducting nanocrystals (quantum dots). |
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Copyright Tim Davis 2012 |
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