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Now showing items 1751-1760 of 2111
850 nm GaAs/AlGaAs DFB lasers with shallow surface gratings and oxide aperture
(2019)
We present and experimentally demonstrate a novel oxide-confined ridge-waveguide distributed feedback (DFB) laser with the first-order surface grating using only a single growth step. The metal contacts are laterally offset ...
Interactions at nano-bio interfaces
(Trinity College (Dublin, Ireland). School of Physics, 2011)
The development of new materials that can be integrated into current technologies is one of the most important challenges of today. As a result, fields such as nanotechnology and biotechnology have seen great advances. ...
Highly Conductive Networks of Silver Nanosheets
(2022)
Although printed networks of semiconducting nanosheets have found success in a range of applications, conductive nanosheet networks are limited by low conductivities (<106 S m−1). Here, dispersions of silver nanosheets ...
Simulations of foams and liquid surfaces
(Trinity College (Dublin, Ireland). School of Physics, 2001)
In this thesis, we combine physics and numerical methods to describe the basic properties of foams and liquid surfaces. In Part I, we provide a brief general introduction to the subject of foam physics, detailing what a ...
Spin Heat Engine Coupled to a Harmonic-Oscillator Flywheel
(2019)
We realize a heat engine using a single-electron spin as a working medium. The spin pertains to the valence electron of a trapped ^{40}Ca^{+} ion, and heat reservoirs are emulated by controlling the spin polarization via ...
The effect of solvent choice on the mechanical properties of carbon nanotube-polymer composites
(2007)
Dispersions of single walled nanotubes in N-methyl-2-pyrrolidone have been exposed to
water and variations in storage temperature. The subsequent degradation of dispersion quality
has been monitored using sedimentation, ...
Fabrication, characterisation and applications of some organic, inorganic and organic-inorganic hybrid nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2009)
This thesis describes the fabrication, characterisation and applications of some
interesting one-dimensional and two-dimensional nanostructures. The bulk of the thesis is
concerned with the deposition of metals, polymers, ...
Spectroscopic metrics allow in situ measurement of mean size and thickness of liquid-exfoliated few-layer graphene nanosheets
(2016)
Liquid phase exfoliation is a powerful and scalable technique to produce defect-free mono- and few-layer graphene. However, samples are typically polydisperse and control over size and thickness is challenging. Notably, ...
Ab-initio study of the electronic and vibrational properties on low-dimensional nanostructures made of layered transition metal di-chalcogenides
(Trinity College (Dublin, Ireland). School of Physics, 2013)
The controlled modulation of the electronic and phonon properties of low dimensional materials via external perturbations such as electric fields, doping, and strain, do represent an important step in the development of ...
Polarisation effects in semiconductor optical amplifiers
(Trinity College (Dublin, Ireland). School of Physics, 2007)
Optical switches based on SOAs are critical elements for the implementation of alloptical
gating. The various wavelength conversion schemes are limited by their
polarisation sensitivity. The polarisation sensitivity of ...