A5063949461- Molecular Junctions and Nanostructures
- Plasmonic and Surface Plasmon Research
- Diamond and Carbon-based Materials Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Metamaterials and Metasurfaces Applications
- Quantum and electron transport phenomena
- Nanowire Synthesis and Applications
- Metal and Thin Film Mechanics
- Force Microscopy Techniques and Applications
- Graphene research and applications
- Perovskite Materials and Applications
- Semiconductor materials and devices
- Strong Light-Matter Interactions
- Neural Networks and Reservoir Computing
- 2D Materials and Applications
Trinity College Dublin
2020-2023
Advanced Materials and BioEngineering Research
2021
MIT Lincoln Laboratory
2003-2004
Massachusetts Institute of Technology
2003-2004
Exceptionally pure epitaxial diamond layers have been grown by microwave plasma chemical vapour deposition, which low boron doping, from 5 × 1014 to 1 1016 cm−3, and the compensating n-type impurities are lowest reported for any semiconducting diamond, <3 1013 cm−3. The hydrogen that bind with making them electrically inactive can be significantly reduced baking >700 °C ∼1 s in air. Schottky diodes made on these films breakdown voltages >6 kV, twelve times highest voltage diode higher than...
Rabi splitting between the longitudinal plasmon of a gold nano-bipyramid and A exciton monolayer MoS2 is observed at room temperature. The dependence on physical dimensions reported. impact bipyramid length, aspect ratio, tip radius coupling strength investigated. mode volume nanoresonator significantly reduced because sharp tips bipyramid, increases with sharpness. results also reveal that greater for larger bipyramids, contrasting previously reported different shapes. This shows, first...
Absorbance of monolayer MoS${}_{2}$ is weak due to its atomic thickness. This poses an obstacle for applications. The authors reveal numerically and experimentally that the resonance dielectric Si nanodisks can enhance absorbance emission MoS${}_{2}$. Taking into account both quantum efficiency modifications by disk resonators, their model successfully explains observed enhancement under normal light incidence. An underlying gold mirror further strengthens A perfectly absorbing structure...
Epitaxial diamond with remarkably low p-type doping (1×1014–1×1017 cm−3) and exceptionally compensation ∼1×1013 cm−3, has enabled the demonstration of a optically-switched conduction modulation epitaxial layer. Charge exchange between substrate layer makes it possible to modulate conductivity Incandescent light will make lightly p-doped insulating ultraviolet radiation conductive again. Once been established remain in same electrical state for days, if kept dark.
Nanoparticle-on-mirror systems are a stable, robust, and reproducible method of squeezing light into sub-nanometer volumes. Graphene is particularly interesting material to use as spacer in such it the thinnest possible 2D can be doped both chemically electrically modulate plasmonic modes. We investigate simple nanoparticle-on-mirror system, consisting Au nanosphere on top an mirror, separated by monolayer graphene. With this we demonstrate, with experiments numerical simulations, how doping...
Strong coupling was detected between single gold nano-bipyramids and mono-layer MoS 2 . It demonstrated that the strength increases with nanoparticle size, even without increasing number of excitons coupled into system.
Rabi splitting occurs when the exchange of energy between an exciton and plasmon is quicker than their intrinsic dissipation rates. When these conditions are met, system splits into two entirely new eigenstates above below original exciton. These peaks called polaritons.