Akshay Rao Viva in Cambridge Patrick was the external examiner for Limeng Ni, a PhD student in the group of Akshay Rao at the University of Cambridge. Limeng was examined on her thesis exploring energy transfer in 2D perovskite materials, nanoparticles, and lanthenide-containing materials with a focus on singlet fission and triplet-triplet annihilation.
Nanowires University of Oxford Condensed Matter Physics Seminar Patrick gave the Oxford Condensed Matter Physics seminar on A needle in a needlestack – exploiting functional inhomogeneity for optimized nano-optoelectronics. In this talk, he presented on recent advances in using high-throughput spectroscopy to study nanowires for optoelectronic applications.
Louise Natrajan Welcome to Matthew Thornton A welcome to Matthew Thornton, a new PhD student on a BBSRC-DTP project led by Dr. Louise Natrajan (Chemistry) and co-supervised by Dr Sam Hay (MIB) and Patrick. Matthew’s project on “Photon Upconversion Probes with Lanthanide Containing Biomolecules” includes rotations working in Chemistry, the Photon Science Institute and the
Group Photo Hard work in the lab After a hard day of installing new laser shields, the group were looking forward to… another day of lab shield installation
Nanowires Collaborator visit to Sheffield Ruqaiya and Patrick visited Prof. David Mowbray at the University of Sheffield to discuss nanowire spectroscopy research.
Import 2022-12-08 21:42 New Paper - Effect of size on the luminescent efficiency of perovskite nanocrystals A new paper led by groups at Cambridge has been published in ACS Applied Energy Materials. In this work, a combination of nanoscale cathodoluminescence and time- and energy-resolved photoluminescence is used to reveal energy dynamics in colloidal perovskite nanocrystals. These techniques relate trap density and Auger effects to stoichiometry and
Tom Flavell Welcome to Tom Flavell A welcome to Tom Flavell, a new PhD student in Physics who is primarily supervised by Prof. Wendy Flavell (no relation) and co-supervised by Patrick and Dr Andrew Thomas. Tom will be working on perovskite quantum dots, and will make use of the low-light spectroscopy facilities based in the OMS
Arturo Alanis New Paper - Threshold reduction and yield improvement of semiconductor nanowire lasers via processing-related end-facet optimization Arturo has had a paper accepted for publication in Nanoscale Advances, describing the impact of the transfer process on the morphology and threshold of semiconductor nanowire lasers. While many studies have sought to improve the threshold for lasing in semiconductor nanowire lasers, the role of process has not been significantly
Import 2022-12-08 21:42 Workshop on Perovskites and Emerging Optoelectronic Materials Thanks to all of the speakers and attendees who came to the Workshop on Perovskites and Emerging Optoelectronic Materials , hosted in the Photon Science Institute. We heard from 8 speakers covering physics, materials and electronic engineering for photovoltaic and light-emitting applications. The workshop was concluded with a seminar presentation from
Harry Rowland Welcome to Harry and Lydia! The group welcomes Harry and Lydia, two Manchester Physics MPhys students to the group. They will work together on a project to develop a high-resolution and low-cost interferometric distance standard using atomic transitions in lanthenide glasses.
Nawal Al-Amairi Welcome to Ruqaiya and Nawal! The group welcomes Ruqaiya and Nawal as two new PhD students working in the group. Ruqaiya will be working on nanolasers for on-chip photonics using both nanowires and nanoshapes developed by collaborators in UCL, ANU and China. Nawal will be working on ultrafast photodetectors based on 2D materials with collaborators
2D Materials New Paper - Visible and infrared photocurrent enhancement in a graphene-silicon Schottky photodetector through surface-states and electric field engin Nawapong Unsuree has had a paper accepted for publication in 2D Materials. coming from a collaboration between the Echtermeyer group (Manchester) and the Parkinson group. The research was conducted in the National Graphene Institute and the Photon Science Institute. This new research reports the application of infrared scanning photocurrent microscopy
Nanowires Talk at UK Semiconductors 2019 Group PhD student Stefan Skalsky gave a talk at the UK Semiconductors meeting in Sheffield. His talk, on “Nanosecond lasing and mm-scale optical coherence length in GaAsP/GaAs Quantum-Well Nanowire Lasers” descibed his recent work using interferometric time-resolved spectroscopy to reveal the end-facet reflectivity in nanowire lasers.
Antonio Hurtado PSI Seminar - Antonio Hurtado The group welcomed Dr Antonio Hurtado of the University of Strathclyde Institute of Photonics to give a seminar at the Photon Science Institute. He spoke on Neuromorphic Photonics – the use of lasers as non-linear elements in a neuromorphic system.
Oxford Tim Crothers - PhD viva in Oxford Patrick acted as external examiner for Tim Crothers, a student with Prof. Laura Herz in Physics at Oxford University. Tim defended his thesis on Charge-carrier transport and recombination dynamics in metal halide perovskites.
Nanowires Tutorial Session at Jaszowiec 2019 Patrick gave a tutorial session at the Jaszowiec 2019 meeting – the International School and Conference on the Physics of Semiconductors – held in Szczyrk in Poland. The session covered the use of ultrafast spectroscopy for developing nanotechnology for optoelectronics, and specifically semiconductor nanowires. A copy of the presentation is available for
Nanowires UK Semiconductor Nanowire Meeting 2019 Patrick spoke and both Arturo and Stefan gave posters at the 2019 UK Semiconductor Nanowire Meeting, held at Corpus Christi College in Oxford. The event was chaired by Patrick and Michael Johnston (Oxford Physics), and it brought nearly 35 researchers from 10 universities together to discuss nanowire research in the
Nanowires New Paper - Highly-Strained III-V-V Co-Axial Nanowire Quantum Wells with Strong Carrier Confinement A new paper has been accepted for publication in ACS Nano. This work, led by Dr. Yunyan Zhang and Prof. Huiyun Liu at University College London, describes the growth and characterisation of quantum-well tube nanowires based on GaAs-GaAsP heterostructures. This work brings together partners from UCL, Sheffield, Warwick, Lund (Sweden)
James Kerfoot New Paper - Two-Dimensional Diffusion of Excitons in a Perylene Diimide Monolayer Quenched by a Fullerene Heterojunction James Kerfoot, supervisor Prof. Peter Beton and colleagues at the University of Nottingham have had a paper accepted in J. Phys Chem. C on exciton diffusion in monolayer organic materials in a collaboration with our Manchester group. In this new work, advanced AFM techniques are coupled to optical micro-spectroscopy to
Import 2022-12-08 21:42 New Arxiv Paper - Visible and infrared photocurrent enhancement in a graphene-silicon Schottky photodetector through surface-states and electric field Nawapong Unsuree has submitted a new paper to the Arxiv reporting on work coming from a recent collaboration between the Echtermeyer group (Manchester) and the Parkinson group. The research was conducted in the National Graphene Institute and the Photon Science Institute. Following on from recent work developing graphene-silicon Schottky photodiodes,
Compressive Sensing MPhys projects 2018 - Welcome The group welcomes four undergraduate MPhys students who will spend the semester working on their final year project: * Lily Shepherd and Rachel Clark return to work on compressive sensing applications for future photovoltaic characterization. * Jade Clarke and Eadie Weston will start a new project on open-science, looking to create 3D
Arturo Alanis New Paper - Emission Properties and Ultrafast Carrier Dynamics of CsPbCl3 Perovskite Nanocrystals Congratulations to Ruben Ahumada-Lazo for his new paper on emission properties of perovskite nanocrystals. In his new paper, published in ACS Journal of Physical Chemistry C, he used ultrafast and high-fluence optical techniques based at the Photon Science Institute to reveal the radiative and non-radiative recombination pathways in CsPbCl3 perovskite
ANU New Paper - Optical Study of p-Doping in GaAs Nanowires for Low-Threshold and High-Yield Lasing Our new work on large-scale statistical spectroscopy to optimize nanowire lasers is published today in Nano Letters. In this work, PhD student Arturo studied thousands of nanowires to identify the lowest threshold nanowire, as well as to model emission to identify the primary sources of non-radiative emission. By quickly sorting
Nanowires Presentation at ICYRAM-2018 Arturo gave an oral presentation on his work – “Nanolaser optimization through statistical optoelectronic analysis” at ICYRAM in Adelaide as part of a IOP Barber Fund supported conference trip.
