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Now showing items 81-90 of 2110
A facetless laser suitable for monolithic integration
(IEEE, 2008)
A novel facetless laser structure is proposed and demonstrated. The facetless laser is realised by
etching deep slots into the mirror sections of a multi section semiconductor laser which provide the
feedback for laser ...
Linewidth enhancement factor and modulation bandwidth of lattice matched 1.5 micron InGaAsN/GaAs quantum well lasers
(SPIE, 2004)
The linewidth enhancement factors of lattice-matched 1.5 ?m wavelength InGaNAs/GaAs and InGaAs/InP singlequantum-
well structures have been calculated using microscopic theory including many-body effects and a ...
Base-specific photocleavage of DNA induced by nanosecond U.V. pulsed laser radiation or methylene blue sensitisation
(1987)
Excitation of DNA in neutral solution either with short-duration, intense pulses of excimer laser (248 nm) radiation or with low intensity red-ligh (633 nm) sensitisation by methylene blue causes cleavage of the DNA backbone ...
Molecular engineering of conjugated organic molecule and carbon nanotube assemblies - a linear and nonlinear spectroscopic study
(Trinity College (Dublin, Ireland). School of Physics, 2007)
Single walled carbon nanotubes (SWNTs) possess unique structural, mechanical
and electronic properties, and are thus promising materials for a host of future applications.
However, their potential is limited in that they ...
Investigation of near-infrared laser diodes for application in space-based spectroscopic gas sensing
(Trinity College (Dublin, Ireland). School of Physics, 2007)
The availability of numerous semiconductor diode lasers that provide wavelength
tuneable, high output power, single frequency emission in the near infrared region of the
spectrum (0.7μm - 2.5μm) provides researchers with ...
Tunable and efficient long range energy transfer via graphene plasmon modes
(2015)
We present a theoretical investigation of the energy transfer efficiency between quantum systems placed in the vicinity of a doped graphene layer using a Green's tensor formalism. The direct interaction, Förster mechanism, ...
An Investigation into the Accretion Processes of Young Stellar Objects
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)
The way in which young stars form is complex and fascinating, and is anything but a smooth, continuous process. Studying their dramatic, and sometimes violent, early years of accreting and ejecting material is vital in ...
Measurement of Foam Density Profiles Using AC Capacitance
(EDP Sciences, 1995)
The dynamics of foam drainage (free, forced and pulsed) is monitored by the determination of local liquid density using a vertical array of capacitors. Liquid profiles are obtained for various drainage experiments. The ...
Ultrafast non-linear optics for telecommunication applications
(Trinity College (Dublin, Ireland). School of Physics, 2003)
The aim of the research done for this thesis was to characterise the properties of a fibre
laser producing ultrashort pulses at the telecommunication wavelength of 1550nm. We also
measured the nonlinear optical properties ...
High charge and discharge rate limitations in ordered macroporous li-ion battery materials
(2020)
Adding porosity to battery electrodes is sometimes useful for accommodating volumetric expansion, electrolyte access to active materials, or mitigating poor high-rate performance for thicker electrodes. Ordered macroporous ...