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Observation of a new interference phenomena in internal conical diffraction
(2015)
Conical diffraction is observed in biaxial materials when a beam of light is directed along one of the two optic axis directions. When the beam is directed close to but not along an optic axis, a rich interference pattern ...
Dependence of Photocurrent Enhancements in Quantum Dot (QD)-Sensitized MoS2 Devices on MoS2 Film Properties
(2018)
This report demonstrates highly efficient nonradiative energy transfer (NRET) from alloyed CdSeS/ZnS semiconductor nanocrystal quantum dots (QDs) to MoS2 films of varying layer thicknesses, including pristine monolayers, ...
High field magnetotransport and point contact Andreev reflection measurements on CuCr2Se4 and CuCr2Se 3Br - Degenerate magnetic semiconductor single crystals
(2014)
Single crystals of the metallically degenerate fully magnetic semiconductors CuCr2Se4 and CuCr2Se3Br have been prepared by the Chemical Vapour Transport method, using either Se or Br as transport agents. The high-quality, ...
Stabilizing effect of a magnetic field on a gas bubble produced at a microelectrode
(2012)
The effect on the growth of a single hydrogen bubble of a magnetic field oriented normal to the surface of a microelectrode is investigated. Overpotential oscillations due to periodic growth and detachment of bubbles are ...
Disorder and synchronization in nonequilibrium Bose-Einstein condensates
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)
In this thesis, we investigate the impact of spatial disorder on driven-dissipative Bose-Einstein condensates (BECs). Bose-Einstein condensation is a collective phenomenon where many particles spontaneously occupy a single ...
Surface-enhanced Raman spectroscopy and fluorescence spectroscopy towards detection of pterins
(Trinity College (Dublin, Ireland). School of Physics, 2013)
In this thesis, a preliminary study is conducted into surface-enhanced Raman spectroscopy (SERS) and fluorescence spectroscopy towards the detection and analysis of pterins. Firstly, investigation of some optical properties ...
Synchronization in disordered oscillator lattices: Nonequilibrium phase transition for driven-dissipative bosons
(2021)
We show that lattices of phase oscillators with random natural frequencies undergo a transition from a desynchronized to a synchronized state for dimensions d<4. The oscillators are described by a generalization of the ...
Low frequency noise peak near magnon emission energy in magnetic tunnel junctions
(2014)
We report on the low frequency (LF) noise measurements in magnetic tunnel junctions (MTJs) below 4 K and at low bias, where the transport is strongly affected by scattering with magnons emitted by hot tunnelling electrons, ...
General approach to the analysis of plasmonic structures using spectroscopic ellipsometry
(2013)
In this article a route to analyze the full optical response of plasmonic structures is developed. First, the simple
case of an anisotropic thin plasmonic layer supported on a transparent substrate is analyzed by ...
Investigating a possible spectral signature of the Wind-ISM interaction region of Alpha Tau
(San Francisco: ASP, 2003)
Ultraviolet spectra from the GHRS instrument on board the Hubble
Space Telescope reveal the presence of a mysterious absorption feature in
the Mg II h & k lines of the nearby (d = 20.0 pc) K5 III star Tau. The
narrow ...