Fionn Downes

Current PhD Student

Theoretical investigation of optical fibre surface plasmon resonance palladium-based hydrogen sensors

The aim of this research project is to develop a theoretical model that describes the operation and optimization of an optical fibre based sensing device for the purpose of detecting hydrogen gas. We propose a novel step-index multimode optical fibre surface plasmon resonance sensing device. Throughout this research, various materials, alloys, nanoparticles, and nanocomposites were investigated for use in the multilayer stack sensing structure. Multi-channel functionality was implemented through wavelength division multiplexing. Finally, the first evidence of surface plasmon and waveguide mode resonance stimulated at equal wavelengths is demonstrated using a single multilayer sensing structure.

 

Papers

• Downes, F. and C.M. Taylor (2017). Theoretical investigation into the optimisation of an optical fibre surface plasmon resonance hydrogen sensor based on a PdY alloy, Measurement Science and Technology, doi:10.1088/1361-6501/28/1/015104.
• Downes, F. and C.M. Taylor (2017). Optimized design of a nanocomposite Ta2O5 and Pd multilayer OFSPR H2 sensor: a theoretical analysis, SPIE Digital Library, doi:10.1117/12.2252038.
• Downes, F. and C.M. Taylor (2016). Theoretical investigation into the optimized design of a durable OFSPR hydrogen sensor based on a PdY alloy, SPIE Digital Library, doi:10.1117/12.2227128.
• Downes, F. and C.M. Taylor (2015). Optical Fibre Surface Plasmon Resonance Sensor Based on a Palladium-Yttrium Alloy, Procedia Engineering, doi:10.1016/j.proeng.2015.08.738.

Presentations

• Environ: Dublin (2014), Sligo (2015), & Limerick (2016).
• Postgraduate Research Seminar, IT Sligo (2014).
• AECOM: Sligo (2015).
• Eurosensors: Freiburg (2015).
• SPIE Photonics Europe: Brussels (2016).
• Postgraduate Research Event: Sligo (2017).
• SPIE Photonics West: San Francisco (2017).
• Photonics Ireland: Galway (2017).

School/DepartmentProgrammeSRC/RRG
Science / Environmental Science PhD CERIS

Funding

President’s Bursary MSc 2014, President’s Bursary PhD 2016, Capacity Building Fund 2017

Supervisor(s)

Dr. Cian Taylor.