Research and practice in science education: a response to Traianou and Hammersley (2008)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
A reader of Traianou and Hammersley's article (in this issue, Oxford Review of Education 34:4), which discusses at some length the work we undertook in the Evidence-based Practice in Science...
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
There has been a great deal of research on children’s misunderstandings of science concepts, but this has not led to marked improvement in teaching and learning. EPSE researchers set out to find...
Hydrodynamic Interactions in Two Dimensions (2008)
Di Leonardo, R., Keen, S., Ianni, F., Leach, J., Padgett, M., Ruocco, G.
We measure hydrodynamic interactions between colloidal particles confined in a thin sheet of fluid. The reduced dimensionality, compared to a bulk fluid, increases dramatically the range of...
Wood-Robinson, C., Lewis, J., Leach, J., Driver, R.
Article de fons
Ametller, J, Leach, J, Scott, P
This article arises from the ESRC Teaching and Learning Research Programme (TLRP) funded thematic seminar series “Curriculum, domain knowledge and pedagogy”. The difficulty of using insights from...
This paper describes an experiment in the development of a small piece of software in both the languages C and C + + in a university setting. The C+ + codes were found to he more modular than the...
Parametric resonance of optically trapped aerosols (2007)
Leonardo, R.Di., Ruocco, G., Leach, J., Padgett, M.J., Wright, A.*, Girkin, J.M.*, ...
The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over- to underdamped oscillations. The spectrum of position fluctuations evolves from a...
Parametric resonance of optically trapped aerosols (2007)
Leonardo, R.Di., Ruocco, G., Leach, J., Padgett, M.J., Wright, A., Girkin, J.M., ...
The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over- to underdamped oscillations. The spectrum of position fluctuations evolves from a...
Parametric resonance of optically trapped aerosols (2007)
Leonardo, R.Di., Ruocco, G., Leach, J., Padgett, M.J., Wright, A., Girkin, J.M., ...
The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over- to underdamped oscillations. The spectrum of position fluctuations evolves from a...
Parametric resonance of optically trapped aerosols (2007)
Di Leonardo, R., Ruocco, G., Leach, J., Padgett, M.J., Wright, A.J., Girkin, J.M., ...
The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over- to underdamped oscillations. The spectrum of position fluctuations evolves from a...
Optical ferris wheel for ultracold atoms (2007)
Franke-Arnold, S., Leach, J., Padgett, M.J., Lembessis, D., Ellinas, D., Wright, A.J., ...
We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples. We demonstrate the realisation of intensity patterns from pairs of Laguerre-Gauss...
Optical ferris wheel for ultracold atoms (2007)
Franke-Arnold, S., Leach, J., Padgett, M.J., Lembessis, D., Ellinas, D., Wright, A.J., ...
We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples. We demonstrate the realisation of intensity patterns from pairs of Laguerre-Gauss...
Optical ferris wheel for ultracold atoms (2007)
Franke-Arnold, S., Leach, J., Padgett, M.J., Lembessis, D., Ellinas, D., Wright, A.J., ...
We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples. We demonstrate the realisation of intensity patterns from pairs of Laguerre-Gauss...
Parametric Resonance of Optically Trapped Aerosols (2007)
Di Leonardo, R., Ruocco, G., Leach, J., Padgett, M. J., Wright, A. J., Girkin, J. M., ...
The Brownian dynamics of an optically trapped water droplet are investigated across the transition from over to under-damped oscillations. The spectrum of position fluctuations evolves from a...
The actual and potential impact of research on the practice of teaching science has been discussed within both academic and policy communities. Radically different conclusions have been advanced....
Optical ferris wheel for ultracold atoms (2006)
Franke-Arnold, S., Leach, J., Padgett, M. J., Lembessis, V. E., Ellinas, D., Wright, A. J., ...
We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples at discrete angular positions. We demonstrate the realisation of intensity patterns...
Improving subject teaching: lessons from research in science education (2006)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
This paper presents the perceptions of research in science education of the potential users of that research. In fact, science education provides a particularly fruitful context for exploring the...
Improving Subject Teaching (2006)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M, Ametller, J, Bartholomew, H, ...
Books in the Improving Learning series are explicitly designed to support “evidence-informed” decisions in educational practice and policymaking. In particular, they combine rigorous social and...
Improving Subject Teaching (2006)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M, Ametller, J, Bartholomew, H, ...
Generation of achromatic bessel beams using a compensated spatial light modulator (2006)
Leach, J., Gibson, G.M., Padgett, M.J., Esposito, E., Wright, A., Girkin, J.M., ...
We report the creation of white-light, achromatic Bessel beams using a spatial light modulator and a prism to compensate for the dispersion. Unlike the Bessel beam created by a refractive axicon,...
Perspectives on designing and evaluating science teaching (2005)
There are increasing numbers of instructional design studies in the science education literature where claims are made about the effectiveness of specific teaching sequences in promoting learning. In...
Evidence-based practice in science education: the researcher-user interface (2005)
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
One aim of the Evidence-based Practice in Science Education (EPSE) Network was to obtain a better understanding of the extent to which practitioners in science education recognise and make use of...
Leach, J., Dennis, M.R., Courtial, J., Padgett, M.J.
Optical vortices generically arise when optical beams are combined. Recently, we reported how several laser beams containing optical vortices could be combined to form optical vortex loops, links and...
Creating permanent 3D arrangements of isolated cells using holographic optical tweezers (2005)
Jordan, P., Leach, J., Padgett, M.J., Blackburn, P., Isaacs, N., Goksor, M., ...
Reports the creation of permanent 3D configurations of cells, at predefined positions, within a gelatin matrix. The technique used holographic optical tweezers to manipulate individual E. coli within...
Creating permanent 3D arrangements of isolated cells using holographic optical tweezers (2005)
Jordan, P., Leach, J., Padgett, M.J., Blackburn, P., Isaacs, N., Goksor, M., ...
Reports the creation of permanent 3D configurations of cells, at predefined positions, within a gelatin matrix. The technique used holographic optical tweezers to manipulate individual E. coli within...
Designing and evaluating short science teaching sequences: improving student learning (2005)
Leach, J, Ametller, J, Hind, A, Lewis, J, Scott, P, Boersma, K, ...
This paper reports a study designed to provide evidence about the feasibility of designing short teaching sequences, based on insights from research and scholarship on teaching and learning science,...
Creating permanent 3D arrangements of isolated cells using holographic optical tweezers (2005)
Jordan, P., Leach, J., Padgett, M.J., Blackburn, P., Isaacs, N., Goksor, M., ...
Reports the creation of permanent 3D configurations of cells, at predefined positions, within a gelatin matrix. The technique used holographic optical tweezers to manipulate individual E. coli within...
Leach, J., Dennis, M. R., Courtial, J., Padgett, M. J.
Optical vortices generically arise when optical beams are combined. Recently, we reported how several laser beams containing optical vortices could be combined to form optical vortex loops, links and...
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
This report presents the findings of an interview and focus group study which explored perceptions of educational research and its use amongst teachers of science and others engaged in science...
Leach, J., Courtial, J., Skeldon, K., Barnett, S.M.*, Franke-Arnold, S., Padgett, M.J.
We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development...
Leach, J., Courtial, J., Skeldon, K., Barnett, S.M., Franke-Arnold, S., Padgett, M.J.
We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development...
Leach, J., Courtial, J., Skeldon, K., Barnett, S.M., Franke-Arnold, S., Padgett, M.J.
We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development...
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
This executive report summarises the findings of an interview and focus group study which explored perceptions of educational research and its use amongst teachers of science and others engaged in...
Towards Evidence-Based Practice in Science Education (2004)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
This summarising statement looks at the activities, outcomes, highlights and achievements of the project Towards Evidence-based Practice in Science Education.
Science education practitioners' views of research and its influence on their practice (2004)
Ratcliffe, M., Bartholomew, H., Hames, V., Hind, A., Leach, J., Millar, R., ...
Research report of project 4 of the Evdience-based practice in science education (EPSE) research network funded by ERSC TLRP This report presents the findings of an interview and focus group study...
Uncertainty of orbital angular momentum and angle - theory (2004)
Zambrini, R., S.Barnett, S. M., Pegg, David Thomas, Leach, J., ...
No
Uncertainty of orbital angular momentum and angle - theory (2004)
Zambrini, R., S.Barnett, S. M., Pegg, David Thomas, Leach, J., ...
Defining the trapping limits of holographical optical tweezers (2004)
Sinclair, G., Jordan, P., Leach, J., Padgett, M.J., Cooper, J.
We report on the limitations of using a spatial light modulator (SLM) within optical tweezers to produce both lateral and axial displacements. We find that lateral displacements of optical traps are...
Laser beams: knotted threads of darkness (2004)
Leach, J., Dennis, M.R., Courtial, J., Padgett, M.J.
Dark lines within a laser beam can be manipulated to form stable vortex knots. Destructive interference may lead to complete cancellation when light waves travelling in different directions cross,...
Uncertainty principle for angular position and angular momentum (2004)
Franke-Arnold, S., Barnett, S.M., Yao, E., Leach, J., Courtial, J., Padgett, M.
The uncertainty principle places fundamental limits on the accuracy with which we are able to measure the values of different physical quantities (Heisenberg 1949 The Physical Principles of the...
Observation of the vortex structure of a non-integer vortex beam (2004)
Leach, J., Yao, E., Padgett, M.J.
An optical beam with an e(i/phi) phase structure carries an orbital angular momentum of lh per photon. For integer l values, the phase fronts of such beams form perfect helices with a single...
McNay, G., Docherty, F.T., Graham, D., Smith, W.E., Jordan, P., Padgett, M., ...
No abstract available.
Sinclair, G., Leach, J., Jordan, P., Gibson, G., Yao, E., Laczik, Z.J., ...
Phase-hologram patterns that can shape the intensity distribution of a light beam in several planes simultaneously can be calculated with an iterative Gerchberg-Saxton algorithm [T. Haist et al.,...
Permanent 3D microstructures in a polymeric host created using holographic optical tweezers (2004)
Jordan, P., Clare, H., Flendrig, L., Leach, J., Cooper, J., Padgett, M.
Permanent 3D microstructures are created within a gel using holographic optical tweezers. The micron-sized particles are arranged in a precise geometry within an appropriate liquid, and become fixed...
3D manipulation of particles into crystal structures using holographic optical tweezers (2004)
Leach, J., Sinclair, G., Jordan, P., Courtial, J., Padgett, M.J., Cooper, J., ...
We have developed holographic optical tweezers that can manipulate many particles simultaneously in three dimensions in order to create micro-crystal structures that extend over many tens of microns....
Towards Evidence-Based Practice in Science Education (2004)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
This summarising statement looks at the activities, outcomes, highlights and achievements of the project Towards Evidence-based Practice in Science Education.
Uncertainty of orbital angular momentum and angle - theory (2004)
Zambrini, R., S.Barnett, S. M., Pegg, David Thomas, Leach, J., ...
Evidence-based Practice in Science Education: The researcher-user interface (2003)
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
One of the four projects in the EPSE (Evidence-based practice in Science Education) network aimed to obtain a better understanding of the extent to which practitioners in science education recognise...
Simplified measurement of the orbital angular momentum of single photons (2003)
Haiqing, Wei, Xin, Xue, Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., ...
We describe a simplification of a recent approach for sorting photons according to their orbital angular momentum (OAM) [Leach et al., Phys. Rev. Lett. 88 (2002) 257901]. The original cascade of...
Ametller, J, Hind, A, Leach, J, Lewis, J, Scott, P
Can it be shown that some science teaching approaches work better than others for achieving specific curriculum aims? The science education research literature identifies learning difficulties and...
Bartholomew, H, Hames, V, Hind, A, Leach, J, Osborne, J, Millar, R, ...
Calls for evidence-based practice raise issues about what constitutes 'evidence' for development of educational policy and classroom practice. This project focused on the experiences of teachers of...
Evidence-based Practice in Science Education (EPSE): The researcher-user interface (2003)
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
The other two papers in this set provide some evidence from collaboration with teachers on specific projects on the role of research evidence in informing their practice. We wished to explore whether...
Fractals in pixellated video feedback (2003)
Leach, J., Padgett, M.J., Courtial, J.
Using experiments and computer simulations, we show that video feedback with a pixel-based monitor can lead to self-similar stationary patterns. We found an astonishing variety of such patterns,...
Optically controlled three-dimensional rotation of microscopic objects (2003)
Bingelyte, V., Leach, J., Courtial, J., Padgett, M.J.
An approach of optically controlled three-dimensional rotation of microscopic objects was studied. A spatially light modulator was used to create a pair of closely separated optical traps holding...
Leach, J, Hind, A, Lewis, J, Scott, P
ESPE Project 2 : ‘Designing and evaluating short teaching sequences, informed by research evidence’ is a sub-project of the research-project ‘Towards evidence-based practice in science...
The nature of science education research (2002)
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
A study by the Evidence-based Practice in Science education Research Network, explored practitioners' views on the nature, use and potential of science education research. The article reports on one...
Towards evidence-based practice in science education (2002)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M, Hames, V, Hind, A, ...
This article argues that teaching should be informed by research and report interim findings from three of the four projects from the Evidence-based Practice in Science Education (ESPE) Research...
Hind, A, Lewis, J, Leach, J, Scott, P
Although there is now a significant database of research evidence about students’ learning of biological concepts, there is general scepticism as to whether this research has had any impact on the...
Measuring the orbital angular momentum of a single photon (2002)
Leach, J., Padgett, M.J., Barnett, S.M.*, Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
Measuring the orbital angular momentum of a single photon (2002)
Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
Measuring the orbital angular momentum of a single photon (2002)
Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
A systematic review of the impact of networked ICT on 5-16 year olds' literacy in English. (2002)
Andrews, R., Burn, A., Leach, J., Locke, T., Low, G., Torgerson, C.
This report is the result of two linked pieces of work undertaken between March 2001 and May 2002. A mapping study was conducted up to November 2001 and identified the range and type of research...
Measuring the orbital angular momentum of a single photon (2002)
Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
Producibility and Serviceability of Kevlar-49 Structures Made on Hot Layup Tools. (2002)
Head,R., Leach,J., Goodall,R., Sitterly,C.
The purposes of the program were: evaluate the producibility of a helicopter structural component made from Kevlar-49 fibers, demonstrate the low cost aspects of using hot layup tools to fabricate...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
There is a growing body of evidence which demonstrates that students' learning of scientific concepts can be improved as a result of implementing research-based teaching sequences. In this paper the...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
Marine cadastre and spatial data infrastructures in marine environment (2002)
Widodo, M. S., Leach, J., Williamson, I. P.
A Cadastre is normally the basis or core of a land administration system and is defined as a parcel based and up-to-date information system containing a record of interests in land (e.g. rights,...
Evidence-based Practice in Science Education 4: Understanding the researcher-user interface (2001)
Ratcliffe, M, Bartholomew, H, Hames, V, Hind, A, Leach, J, Millar, R, ...
The work reported in this paper is at an earlier stage than others in this symposium. The major intention of this paper is to give an indication of the methodology being used to explore...
Image processing: Fractals in pixellated video feedback (2001)
Courtial, J., Leach, J., Padgett, M.J.
Video feedback occurs whenever a video camera is directed at a screen displaying the image currently being recorded by the camera. It can be observed in everyday situations, for example at sporting...
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
The central aim of this Research Network is to improve the interface between science education researchers and teachers, by developing and evaluating several examples of evidence-based practice in...
Towards Evidence-based Practice in Science Education (EPSE) - poster (2000)
Millar, R, Leach, J, Osborne, J, Ratcliffe, M
This poster discusses the rationale and methodology of the project, Towards Evidence-based Practice in Science Education (EPSE). The aim of the EPSE Research Network is to explore ways in which...
The generation of focused intensities of 5x1019 Wcm-2 (1999)
Danson, CN, Allott, R, Booth, G, Collier, J, Edwards, CB, Flintoff, PS, ...
Generation of focused intensities of 5 ´ 1019 W cm-2 (1999)
Danson, CN, Allott, R, Booth, G, Collier, J, Edwards, CB, Flintoff, PS, ...
Generation of focused intensities of 5 10 19 W cm-2 (1999)
Danson, CN, Allott, R, Booth, G, Collier, J, Edwards, CB, Flintoff, PS, ...
Generation of focused intensities of 5 10 19 W cm-2 (1999)
Danson, CN, Allott, R, Booth, G, Collier, J, Edwards, CB, Flintoff, PS, ...
Petawatt enhancement of the vulcan high power Nd: Glass laser - Phase 1 (1998)
Edwards, CB, Toner, WT, Danson, CN, Allott, R, Angood, S, Barzanti, L, ...
Petawatt enhancement of the Vulcan high power Nd:Glass laser - Phase I (1998)
Edwards, CB, Toner, WT, Danson, C N, Allott, R, Angood, S, Barzanti, L, ...
Reasoning with Preorders and Dynamic Sorts using Free Variable Tableaux (1996)
A. Gavilanes, J. Leach, P.J. Martín, P. J. Mart'in, S. Nieva
. In this paper we present a three valued many sorted logic for dealing with preorders, incorporating subsort relations into the syntax of the language, and where formulas taking the third boolean...
Free Variable Tableaux for a Many Sorted Logic with Preorders (1996)
Antonio Gavilanes, Javier Leach, Susana Nieva, A. Gavilanes, J. Leach, S. Nieva
The proof of properties of formal systems including inequalities is currently evolving into an increasingly appealing workline in different areas of computer science. We propose a sound and complete...
Reasoning with Preorders and Dynamic Sorts using Free Variable Tableaux (1996)
Antonio Gavilanes, Javier Leach, Pedro J. Mart'in, Susana Nieva, A. Gavilanes, J. Leach, ...
. In this paper we present a three valued many sorted logic for dealing with preorders, incorporating subsort relations into the syntax of the language, and where formulas taking the third boolean...
Free Variable Tableaux for a Many Sorted Logic with Preorders (1996)
Gavilanes Leach, A. Gavilanes, J. Leach, S. Nieva
. We propose a sound and complete free variable semantic tableau method for handling many-sorted preorders in a first order logic, where functions and predicates behave monotonically or...
High altitude dives in the Nepali Himalaya (1994)
J. Leach, A. McLean, F. B. Mee
Undersea and Hyperbaric Medical Society, Inc. (http://www.uhms.org )
Underwater visibility and the recall of subsea marker panels. (1993)
The identification and recall of subsea markers is a common task amongst offshore commercial divers. Two experiments explored the accuracy of reproduction of subsea marker panels by commercial divers...
Issues in teaching computing cognition. (1993)
Leach, J. ;, Hammond, N. ;, Blyth, B. ;, Crawshaw, M. ;, Orchard, G., Shelton, T.
A 40 MEFLOPS digital signal processor. The first supercomputer on a ship (1987)
Blalock, D., Potts, J., Leach, J., Koeppen, P., Leigh, T., Simar, R.
Heterokaryon incompatibility in the plant-pathogenic fungus, Cochliobolus heterostrophus (1983)
Cochllobolus heterostrophus, the fungus that causes southern corn leaf blight, was found to have a genetic system that controls heterokaryon formation between cornplementary auxotrophs. This was...
1020 W cm-2 to target with the upgraded Vulcan laser system
Allott, R, Angood, S, Beckwith, C, Booth, G, Collier, J, Danson, C N, ...
Proceedings of Applied Optics and Optoelectronics 1998, Ed K T V Grattan, publ IoP Publishing 219 (1998)
Focused intensities of 1020 W cm-2 with the upgraded Vulcan CPA interaction facility
Danson, CN, Allott, RM, Angood, S, Booth, G, Collier, JL, Damerell, CR, ...
Ed W H Lowdermilk, SPIE 3492 82-93 (1999)
1020 Wcm-2 for laser plasma interactions with the upgraded Vulcan CPA facility
Allott, R, Angood, S, Beckwith, C, Booth, G, Collier, J, Danson, CN, ...
Diagnostic instrumentation developments for x-ray emission spectroscopy
Notley, M, Damerell, A, Danson, C, Leach, J, Neely, D, Lin, J, ...
Focused intensities of 1020 Wcm-2 to target with the upgraded Vulcan CPA interaction facility
Danson, CN, Allott, R, Angood, S, Beckwith, C, Booth, G, Collier, J, ...
VULCAN: A versatile ultra high power Nd:glass laser system
Winstone, TB, Danson, CN, Allott, R, Booth, G, Collier, J, Damerell, A, ...
Recent Instrumentation Developments for X-ray Emission Spectroscopy
Notley, M M, Damerell, A, Danson, C, Leach, J, Neely, D, Lin, J, ...
1020 W cm-2 to target with the upgraded Vulcan laser system
Allott, R, Angood, S, Beckwith, C, Booth, G, Collier, J, Danson, CN, ...
Ed K T V Grattan, publ IoP Publishing 219 (1998)
Optically controlled three-dimensional rotation of microscopic objects
Bingelyte, V., Leach, J., Courtial, J., Padgett, M.J.
An approach of optically controlled three-dimensional rotation of microscopic objects was studied. A spatially light modulator was used to create a pair of closely separated optical traps holding...
Simplified measurement of the orbital angular momentum of single photons
Haiqing, Wei, Xin, Xue, Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., ...
We describe a simplification of a recent approach for sorting photons according to their orbital angular momentum (OAM) [Leach et al., Phys. Rev. Lett. 88 (2002) 257901]. The original cascade of...
Fractals in pixellated video feedback
Leach, J., Padgett, M.J., Courtial, J.
Using experiments and computer simulations, we show that video feedback with a pixel-based monitor can lead to self-similar stationary patterns. We found an astonishing variety of such patterns,...
Leach, J., Courtial, J., Skeldon, K., Barnett, S.M., Franke-Arnold, S., Padgett, M.J.
We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development...
Measuring the orbital angular momentum of a single photon
Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
Defining the trapping limits of holographical optical tweezers
Sinclair, G., Jordan, P., Leach, J., Padgett, M.J., Cooper, J.
We report on the limitations of using a spatial light modulator (SLM) within optical tweezers to produce both lateral and axial displacements. We find that lateral displacements of optical traps are...
Laser beams: knotted threads of darkness
Leach, J., Dennis, M.R., Courtial, J., Padgett, M.J.
Dark lines within a laser beam can be manipulated to form stable vortex knots. Destructive interference may lead to complete cancellation when light waves travelling in different directions cross,...
Uncertainty principle for angular position and angular momentum
Franke-Arnold, S., Barnett, S.M., Yao, E., Leach, J., Courtial, J., Padgett, M.
The uncertainty principle places fundamental limits on the accuracy with which we are able to measure the values of different physical quantities (Heisenberg 1949 The Physical Principles of the...
Observation of the vortex structure of a non-integer vortex beam
Leach, J., Yao, E., Padgett, M.J.
An optical beam with an e(i/phi) phase structure carries an orbital angular momentum of lh per photon. For integer l values, the phase fronts of such beams form perfect helices with a single...
Visual observations of SERRS from single silver-coated silica microparticles within optical tweezers
McNay, G., Docherty, F.T., Graham, D., Smith, W.E., Jordan, P., Padgett, M., ...
No abstract available.
Sinclair, G., Leach, J., Jordan, P., Gibson, G., Yao, E., Laczik, Z.J., ...
Phase-hologram patterns that can shape the intensity distribution of a light beam in several planes simultaneously can be calculated with an iterative Gerchberg-Saxton algorithm [T. Haist et al.,...
Permanent 3D microstructures in a polymeric host created using holographic optical tweezers
Jordan, P., Clare, H., Flendrig, L., Leach, J., Cooper, J., Padgett, M.
Permanent 3D microstructures are created within a gel using holographic optical tweezers. The micron-sized particles are arranged in a precise geometry within an appropriate liquid, and become fixed...
3D manipulation of particles into crystal structures using holographic optical tweezers
Leach, J., Sinclair, G., Jordan, P., Courtial, J., Padgett, M.J., Cooper, J., ...
We have developed holographic optical tweezers that can manipulate many particles simultaneously in three dimensions in order to create micro-crystal structures that extend over many tens of microns....
Optically controlled three-dimensional rotation of microscopic objects
Bingelyte, V., Leach, J., Courtial, J., Padgett, M.J.
An approach of optically controlled three-dimensional rotation of microscopic objects was studied. A spatially light modulator was used to create a pair of closely separated optical traps holding...
Simplified measurement of the orbital angular momentum of single photons
Haiqing, Wei, Xin, Xue, Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., ...
We describe a simplification of a recent approach for sorting photons according to their orbital angular momentum (OAM) [Leach et al., Phys. Rev. Lett. 88 (2002) 257901]. The original cascade of...
Fractals in pixellated video feedback
Leach, J., Padgett, M.J., Courtial, J.
Using experiments and computer simulations, we show that video feedback with a pixel-based monitor can lead to self-similar stationary patterns. We found an astonishing variety of such patterns,...
Leach, J., Courtial, J., Skeldon, K., Barnett, S.M., Franke-Arnold, S., Padgett, M.J.
We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development...
Measuring the orbital angular momentum of a single photon
Leach, J., Padgett, M.J., Barnett, S.M., Franke-Arnold, S., Courtial, J.
We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus...
Defining the trapping limits of holographical optical tweezers
Sinclair, G., Jordan, P., Leach, J., Padgett, M.J., Cooper, J.
We report on the limitations of using a spatial light modulator (SLM) within optical tweezers to produce both lateral and axial displacements. We find that lateral displacements of optical traps are...
Laser beams: knotted threads of darkness
Leach, J., Dennis, M.R., Courtial, J., Padgett, M.J.
Dark lines within a laser beam can be manipulated to form stable vortex knots. Destructive interference may lead to complete cancellation when light waves travelling in different directions cross,...
Uncertainty principle for angular position and angular momentum
Franke-Arnold, S., Barnett, S.M., Yao, E., Leach, J., Courtial, J., Padgett, M.
The uncertainty principle places fundamental limits on the accuracy with which we are able to measure the values of different physical quantities (Heisenberg 1949 The Physical Principles of the...
Observation of the vortex structure of a non-integer vortex beam
Leach, J., Yao, E., Padgett, M.J.
An optical beam with an e(i/phi) phase structure carries an orbital angular momentum of lh per photon. For integer l values, the phase fronts of such beams form perfect helices with a single...
Visual observations of SERRS from single silver-coated silica microparticles within optical tweezers
McNay, G., Docherty, F.T., Graham, D., Smith, W.E., Jordan, P., Padgett, M., ...
No abstract available.
Sinclair, G., Leach, J., Jordan, P., Gibson, G., Yao, E., Laczik, Z.J., ...
Phase-hologram patterns that can shape the intensity distribution of a light beam in several planes simultaneously can be calculated with an iterative Gerchberg-Saxton algorithm [T. Haist et al.,...
Permanent 3D microstructures in a polymeric host created using holographic optical tweezers
Jordan, P., Clare, H., Flendrig, L., Leach, J., Cooper, J., Padgett, M.
Permanent 3D microstructures are created within a gel using holographic optical tweezers. The micron-sized particles are arranged in a precise geometry within an appropriate liquid, and become fixed...
3D manipulation of particles into crystal structures using holographic optical tweezers
Leach, J., Sinclair, G., Jordan, P., Courtial, J., Padgett, M.J., Cooper, J., ...
We have developed holographic optical tweezers that can manipulate many particles simultaneously in three dimensions in order to create micro-crystal structures that extend over many tens of microns....
AIDS-related Pneumocystis carinii pneumonia successfully treated with dapsone-trimethoprim.
Green, S T, Goldberg, D J, Leach, J, Christie, P R, Kennedy, D H
The legacy of vigabatrin in a regional epilepsy clinic
Nicolson, A, Leach, J, Chadwick, D, Smith, D
Methods: Retrospective review of 583 patients prescribed vigabatrin at any time between 1989 and 2001 from a regional and satellite epilepsy clinic. Data were collected on dose and duration of...
Vinjamuri, S., Leach, J, Hart, I
A 39-year-old man with advanced adult-onset Rasmussen's encephalitis was treated with prednisolone and long-term, high-dose, human intravenous immunoglobulin. A pretreatment, semiquantitative...