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Now showing items 661-670 of 2111
Large Energy Transfer Distance to a plane of Gold Nanoparticles
(2012)
The quenching of emission in proximity to metallic surfaces via non-radiative energy transfer is studied for sensing applications. It can also be used for the measurement of distances on the nanoscale. We report on energy ...
Optical and magnetic-circular-dichroism-optically-detected-magnetic-resonance study of the Co2+ ion in LiGa5O8
(American Physical Society, 1992)
Optical and magnetic-circular-dichroism?optically-detected-magnetic-resonance studies have been carried out on Co-doped LiGa5O8. The Co ions are found to be predominantly in the 2+ charge state and to substitute for ...
Novel Characterisation and Modelling Techniques for Spintronic Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)
Spintronic materials have the potential to revolutionise certain aspects of information technology. An ideal material for spintronics is a zero-moment half-metal (ZMHM), which exhibits no stray magnetic field but simultaneously ...
Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)
(2009)
The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers ...
Structural, electronic and magnetic properties of ferromagnetic perovskites : a comparative study
(Trinity College (Dublin, Ireland). School of Physics, 2001)
During the course of this research work, the physical properties of twelve mixed-valence manganites have been investigated and compared. Upon embarking on this project, the prospect of incorporating these newly re-discovered ...
Optical phase conjugation In a soluble polymer
(1986)
Degenerate four-wave mixing of picosecond light pulses in polydiacetylene dissolved in toluene has been observed. Phase conjugate reflectivities of over 100% were obtained. The origin of the non-linear interaction was found ...
Amplitude coda of classical waves in disordered media
(2002)
The propagation of classical waves in the presence of a disordered medium is studied. We consider wave
pulses containing a broad range of frequencies in terms of the configurationally averaged Green function of the
system. ...
Graphene-nonlinear optical properties and modelocking capabilities
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
In this thesis, graphene saturable absorber mirror's (SAM) potential for mode-locking ultrafast lasers has been demonstrated, in particular at 2 μm. The saturable absorption of graphene thin films (prepared via drop-casting ...
Probing thermal expansion coefficients of monolayers using surface enhanced Raman scattering
(2016)
Monolayer transition metal dichalcogenides exhibit remarkable electronic and optical properties, making them candidates for application within flexible nano-optoelectronics, however direct experimental determination of ...
Percolation scaling in composites of exfoliated MoS 2 filled with nanotubes and graphene
(2012)
Applications of films of exfoliated layered compounds in many areas will be limited by their relatively low electrical conductivity. To address this, we have prepared and characterised composites of a nano-conductor ...