A5030753218- Geology and Paleoclimatology Research
- Plasmonic and Surface Plasmon Research
- Gold and Silver Nanoparticles Synthesis and Applications
- Metamaterials and Metasurfaces Applications
- Geological formations and processes
- Isotope Analysis in Ecology
- Photonic Crystals and Applications
- Radioactivity and Radon Measurements
- Radioactive contamination and transfer
- Archaeology and ancient environmental studies
- Nuclear and radioactivity studies
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Earthquake Detection and Analysis
- Coastal and Marine Dynamics
- Aeolian processes and effects
- Advanced Antenna and Metasurface Technologies
- Quantum Dots Synthesis And Properties
- Landslides and related hazards
- Advanced biosensing and bioanalysis techniques
- Neutrino Physics Research
- Geological and Geochemical Analysis
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Maritime and Coastal Archaeology
Technical University of Denmark
2018-2023
Aarhus University
2018-2022
Royal Holloway University of London
2022
University of Geneva
2011-2019
Charles Humbert 8
2019
Nordic Laboratory for Luminescence Dating
2018-2019
University of Wollongong
2014-2018
The University of Texas at Dallas
2016
University of the Witwatersrand
2014-2015
Delft University of Technology
2009-2012
We report results from the first search for νμ→νe transitions by NOvA experiment. In an exposure equivalent to 2.74×1020 protons on target in upgraded NuMI beam at Fermilab, we observe 6 events Far Detector, compared a background expectation of 0.99±0.11(syst) based Near Detector measurement. A secondary analysis observes 11 with 1.07±0.14(syst). The 3.3σ excess observed primary disfavors 0.1π<δCP<0.5π inverted mass hierarchy 90% C.L.Received 19 January...
This paper reports the first measurement using NOvA detectors of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance in a beam. The analysis uses 14 kton-equivalent exposure $2.74\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons-on-target from Fermilab NuMI Assuming normal neutrino mass hierarchy, we measure $\mathrm{\ensuremath{\Delta}}{m}_{32}^{2}=({2.52}_{\ensuremath{-}0.18}^{+0.20})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}\text{ }\text{ }{\mathrm{eV}}^{2}$ and...
We theoretically analyze, fabricate, and characterize a three-dimensional plasmonic nanostructure that exhibits strong isotropic magnetic response in the visible spectral domain. Using two different bottom-up approaches rely on self-organization colloidal nanochemistry, we fabricate clusters consisting of dielectric core spheres, which are smaller than wavelength incident radiation decorated by large number metallic nanospheres. Hence, despite having complicated inner geometry, such...
Abstract Extreme storms present a major risk to coasts. Increasing populations worldwide, together with sea level rise, exacerbate concerns for coastal settlements, but the low frequency of extreme makes an assessment difficult. In southeast Australia, severest beach retreat on record relates series extratropical cyclones in 1970s, relatively short observational hinders how frequent these events are. At Moruya New South Wales, four decades monitoring has provided new insights into response...
In the OSL dating of sediment, scatter in equivalent dose (D e) between grains is almost always larger than would be expected due to counting statistics alone. Some may caused by insufficient (partial) bleaching some prior deposition. order date partially bleached it essential estimate amount other processes (e.g. grain-to-grain variability natural rate). Measurements such are performed at single-grain level; contrast, most on multi-grain subsamples, for which reduced through averaging. Here...
Future changes in climate and sea level are likely to increase the threat from storm surges many coastal regions. Mitigation of this requires an understanding surge magnitude frequency, relationship these variables parameters. This is currently limited by brevity instrumental records, which rarely predate twentieth century. However, evidence former can be recorded dunes, because dune topography may trap high-magnitude deposits at elevated locations. Here we combine a range techniques extract...
An invisibility cloak has been designed, realized and characterized. The hides free-standing sub-wavelength three-dimensional objects at the short wavelength edge of visible spectrum. By a bottom-up approach was self-assembled around object. Such fabrication constitutes further important step towards real world applications cloaking; leaving realm curiosity. way it fabricated opens an avenue for many spectacular nanooptical such as non-disturbing sensors photo-detectors, highly efficient...
Using bottom-up and self-assembly processes, large scale layered arrays of strongly coupled gold nanoparticles with controllable dimensions were fabricated. By carefully adjusting the distance between adjacent nanoparticle arrays, it is possible to control coupling localized surface plasmon polariton resonance as sustained by individual nanoparticles. A greater interaction observed at smaller separations, leading a well pronounced shift in spectral position resonances that can be adjusted...
Abstract Nowadays for the sake of convenience most plasmonic nanostructures are fabricated by top-down nanofabrication technologies. This offers great degrees freedom to tailor geometry with unprecedented precision. However, it often causes disadvantages as well. The structures available usually planar and periodically arranged. Therefore, bulk difficult fabricate periodic arrangement undesired effects, e.g., strong spatial dispersion is observed in metamaterials. These limitations can be...
There is considerable uncertainty over the nature and causes of Holocene dust activity in Arctic, its links to climatic changes. Loess deposits act as near-source archives deposition provide a means address these uncertainties. Here we develop fully independent age model for loess core taken Adventdalen, Svalbard, based on 136 quartz luminescence ages at 2 cm intervals. This represents most detailed dating analysis undertaken date sedimentary archive. Extensive laboratory tests stratigraphic...
Abstract. The optically stimulated luminescence (OSL) signal from fluvial sediment often contains a remnant the previous deposition cycle, leading to partially bleached equivalent-dose distribution. Although identification of burial dose is primary concern, degree bleaching could potentially provide insights into transport processes. However, comparison between samples complicated by sample-to-sample variation in aliquot size and sensitivity. Here we begin development an age model account...
A two-fold active control of the plasmonic resonance randomly distributed gold nanoparticles (GNPs) has been achieved. GNPs have immobilized on an Indium Tin Oxide (ITO) coated glass substrate and then covered with a liquid crystalline compound. The system investigated by means atomic force scanning electron microscopy, revealing presence isolated well GNPs. application external electric field to sample consequence: re-orientation hybrid-aligned crystal layer formation carrier accumulation...
Large shifts in the plasmonic resonances of a thin film gold nanorods (GNRs) are induced through modulation local refractive index neighboring dielectric medium. This change is enabled light-induced surface reorientation nematic liquid crystal contact with nanometer-thin photoalignment layer coating GNR film. The presence isolated and well distributed GNRs, both before after deposition, shown atomic force scanning electron microscopy. Exposure to polarized light reorient aligned molecules an...
Surface-enhanced Raman spectroscopy takes advantage of plasmonic substrates that sustain resonances at tunable frequencies with a reproducibly extraordinary field enhancement. Low-cost and large-scale fabrication these is further required. Here, we present stacked arrays strongly coupled gold nanoparticles as promising candidates for such substrates. These are fabricated by bottom-up techniques fulfill the aforementioned requirements. The distance between adjacent in stack controlled high...