For more information on the following, please email me, Robert Scholten.
Also feel free to visit me in my office (room 508) or in the lab (room
559) to see what's happening, and of course click on the links below
for details about each project.
Nanofab: Nanofabrication
by laser-focussed atomic deposition; experiment (Luke Maguire, Karl
Weber and Robert Scholten)
Tem01: Focussing
ultra-cold atoms with a new type of lens for atoms; experiment (Luke
Maguire and Robert Scholten)
Zeeman: Ultracold atom
beam using Raman coupling; experiment and theory (Luke Maguire, Karl
Weber and Robert Scholten)
Non-linear: Extreme
non-linear optics using induced atomic coherence; theory/modelling and
experiment. (Karl Weber and Robert Scholten)
Trap: Trapping and
controlling single atoms in a magneto-optic trap; experiment
(Lincoln Turner and Robert Scholten)
Phase:
Non-interferometric phase imaging of dilute atomic vapours, e.g. atoms
in our new magneto-optic trap; theory and experiment (Lincoln Turner,
Karl Weber and Robert Scholten)
Laser cooling: Probing laser
cooling in a magneto-optic trap using polarised fluorescence imaging;
theory and/or experiment (Karl Weber, Colin Hawthorn and Robert Scholten)
Diode lasers: Diode
lasers for laser cooling and trapping; experiment (Robert Scholten)
Photonics and Visible Optics
Determination of Wigner functions and coherence properties of classical optical wavefields ( Ann Roberts)
Non-destructive defect detection in artworks using phase imaging and electronic speckle pattern interferometry( Ann Roberts with Ian Potter Conservation Service)
Characterisation of photonic devices using novel imaging techniques ( Ann Roberts)
Atomic Physics Experiments: Tests of Quantum Electro-Dynamics and X-ray interactions:
Chris Chantler
X-ray measurement of atomic form factors f and the refractive index RI:
Our international measurements are two orders of magnitude more accurate than previous literature.
This has opened up a new field and initiated questions about relativistic,
and QED contributions to observed interactions.
Investigation of X-ray scattering and fluorescence distributions.
These investigate the real component of the atomic form factor, and the radial electron density in atomic systems.
The relativistic component of f has never been accurately measured.
Development and design of X-ray spectrometers for high-precision measurement in X-ray physics and QED.
We have made the highest precision test of QED for Vanadium using an Electron Beam Ion Trap.
Models of X-ray source distributions (expt and computation).
X-ray sources produce spectra which are relied on around the world; but theory is unable to predict experimental observed distributions.
Measurement of reflectivity.
Details of reflectivity profiles test dynamical diffraction theory and investigate surface roughness in materials.
Theory of Atomic and Quantum Physics and X-ray Optics: Chris Chantler
Atomic form factors (scattering of X-rays/diffraction/atomic structure).
Particular questions relate to high-energy limits, analytic formulations, S-matrix quantum field theory and correlated perturbation theory
Isolated Particle Approximation models, XAFS and near-edge structure (scattering, atomic structure & crystals).
Anomalies in current experimental data from synchrotron research.
Dynamical diffraction from curved crystals (diffraction / mosaicity).
Synchrotrons use advanced X-ray optics and need advanced theory to calibrate and predict results.
Created: 22 July 2002
Last modified: 1 September 2003
Authorised by: Dr Ann Roberts, School of Physics
Maintained by: Dr Ann Roberts, School of Physics