Photon Factory

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Dual Wavelength Ultrafast Ablation Pulse shaping for laser improved micromachining


Supervisor

Cather Simpson

Claude Aguergaray

Discipline

Photon Factory

Project code: SCI196

We are currently seeking Summer scholarship Student for a study on an exciting project involving dual wavelength laser micromachining, supervised by Prof. Cather Simpson. This will utilize second harmonic generation to produce a secondary wavelength as well as varying the time delay between the pulses in the order of picoseconds. This aims to improve the processing rate of femtosecond laser ablation – an exciting and highly accurate technique.

Using this overlap the project will investigate the effect of the time delay between the two pulses on the ablation of materials with a variety of bandgaps – studying both the effect of the bandgap on the optimum time delay and the laser interaction with the plasma produced.

Pulse shaping for laser improved micromachining


Supervisor

Cather Simpson

Claude Aguergaray

Discipline

Photon Factory

Project code: SCI197

We are currently seeking Summer scholarship Student for study on temporal and spectral pulse shaping to broaden our expertise in laser micro-machining. Typical surface processing with light is done with a train of single pulses. We propose to investigate in this project dual-pulse light-matter interaction. This project will be supervised by Prof. Cather Simpson.

This project sits in the middle of multiple domains. It involves understanding fibre lasers, pulse shaping and laser micro-machining. The aim of the project is to explore the light-matter interaction using a range of pulse configuration (dual-pulse separation, pulse shape, pulse chirp, etc.) on various materials.

Machining parameter study of new ultrafast lasers


Supervisor

Cather Simpson

Claude Aguergaray

Discipline

Photon Factory

Project code: SCI198

We are currently seeking summer scholarship student for a study of machining using new ultrafast lasers, supervised by Prof. Cather Simpson. The aim of this will be to undertake parameter studies machining materials that have been characterised by our existing ultrafast laser. This is to understand how to take advantage of the new parameters and features available to us.

This project combines both machining knowledge and understanding of the light matter interaction across a range of materials and parameters – such as repetition rate and pulse width.

Nanosecond Ablation regression study


Supervisor

Cather Simpson

Discipline

Photon Factory

Project code: SCI199

We are currently seeking summer scholarship student for an in depth data study on the material behaviour of nanosecond laser ablation, supervised by Prof. Cather Simpson. Short pulsed laser ablation is a field still under research to understand mechanisms and how material and laser properties link to ablation characteristics.
The aim of this project is to use the wealth of information available on nanosecond laser ablation to perform analysis to understand how these the various properties correlate. This would be achieved through a regression study and be looking at properties such as material type, bandgap, conductivity, laser wavelength etc.

How can we make new 2D wonder-materials with lasers?


Supervisor

Cather Simpson

Discipline

Photon Factory

Project code: SCI200

We are currently seeking a summer scholarship student to investigate a project bridging the worlds of materials science and ultrafast optics. 2D materials (e.g. graphene, MoS2, phosphorene) have been hailed as the wonder materials of the 21st century. However, they are difficult to make on a large scale.

Previous work in the group has shown the efficacy of ultrafast lasers in the patterning of graphene via laser reduction of graphene oxide. This summer project will delve deeper into the mechanism of the process, using a range of advanced spectroscopic techniques (ultrafast transient absorption and picosecond time resolved Raman spectroscopy), along with computational modelling (density functional theory, molecular mechanics). The details of the project can be tailored to the interest of the student, and can lean towards experimental work of theory/modelling. 

LIPSS-Sticks - Pattern Formation and Self-Organization in the Growth of Titania Nanotubes


Supervisor

Cather Simpson

Wei Gao

Discipline

Photon Factory

Project code: SCI201

We are currently seeking a summer scholarship student to investigate a project run in collaboration between physics, chemistry, and materials engineering. Self-organization is a principle found everywhere in nature, for example in the growth of organisms and phase transitions. In the lab, an interesting system used to study the nonlinear governing equations giving rise to this behaviour are anodized titania nanotubes. By patterning the surface of titanium with Laser Induced Periodic Surface Structures (LIPSS) prior to growth, we can manipulate the ‘initial conditions’ of the equation, study the growth of titania nanotubes, and compare them to numerical predictions of the morphology. This project will involve the fabrication of the nanotubes, numerical/analytical simulation of its growth and characterization using electron microscopy and spectroscopy. 

Many ‘Clicks’ Make Light Work: Photochemical Surface Patterning on the Nanoscale


Supervisor

Cather Simpson

Discipline

Photon Factory

Project code: SCI202

We are currently seeking a summer scholarship student to work on an exciting project at the interface between chemistry and materials science. The project will investigate a novel method to selectively functionalise surfaces via recently developed photochemical techniques. An ultrafast laser will be used to trigger a photo-click reaction to conjugate a variety of small molecules onto a surface, with nanometre precision. These small molecules can possess a range of useful properties. The synthesised surfaces will be characterized using a range of advanced spectroscopic tools. The patterned surfaces can be used in applications such as templating 2D materials, sensor fabrication, and biologically active matrices. 

Protein Origami: A novel investigation of single-layered protein film folding


Supervisor

Cather Simpson

Juliet Gerrard

Discipline

Photon Factory

Project code: SCI203

We are currently seeking a summer scholarship student for a study on an exciting project that marries the art of origami with the chemistry of protein films and the physics of ultra-fast lasers. The project will involve a preliminary investigation into the properties of whey protein films and how they may be manipulated in order to change their shape, or fold. Based on a new class of tessellating origami folds, whey films will be fabricated and precision engraved with an ultra-fast laser and then primed to assemble when triggered. This previously untested investigation, if successful, will contribute to the creation of a platform of natural, safe biomaterials with applications in wound care, food packaging and beyond. 

Superconductor sandwiches: Raman spectroscopy close to absolute zero


Supervisor

Cather Simpson

Ben Mallett

Discipline

Photon Factory

Project code: SCI204

Thin films of a superconductor sandwiched between magnetic material layers behave completely differently from the superconductor by itself. The project will use combined Raman spectroscopy and electrical resistance at cryogenic temperatures to investigate this surprising coupling between the layers in our superconductor sandwiches.