Atom guiding in free-space light beams and photonic crystal fibres
Abstract
In this thesis I describe experimental work and present data on the guiding of
Rubidium atoms along free-space propagating light beams as well as within hollow
core glass fibres, namely photonic crystal fibres. I describe experiments, laser systems
and vacuum trap assemblies designed to facilitate this guiding.
These experiments are intended to aid progression within the field of cold
atom guidance wherein narrow diameter, long distance hollow-fibre guides are a
current goal. Realisation of these guides could lead to promising applications such as
atom interferometers and spatially accurate, multi-source, atom depositors.
Herein, guided fluxes are observed in free-space guiding experiments for
distances up to 50mm and up to 10GHz red-detuning from resonance. Additionally
hollow-core, Kagome structured, quasi- and true-photonic crystal fibres are
characterised. Finally a number of detailed fibre-guiding magneto-optic traps are
developed.
Both cold atomic-beams and cold atomic clouds are reliably positioned above
fibre entrance facets in conjunction with a guiding laser beam coupled into the fibre
core.
Issues regarding optical flux detection outwith fibre confinement appear to
have hindered observation of guided atoms. A far more sensitive detection system has
been developed for use in current, ongoing fibre-guide experiments.
Type
Thesis, PhD Doctor of Philosophy
Rights
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