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Brasselet E.,French National Center for Scientific Research | Gervinskas G.,Swinburne University of Technology | Seniutinas G.,Swinburne University of Technology | Juodkazis S.,Swinburne University of Technology | Juodkazis S.,Australian National Fabrication Facility
Physical Review Letters | Year: 2013

We propose a discrete set of continuous deformation of a circular nanoslit to generate and control optical vortices at the microscopic scale. The process relies on the interplay between the spin and orbital angular momentum degrees of freedom of light mediated by appropriate closed-path nanoslits milled on a thin gold film. Topological shaping of light is experimentally demonstrated in the visible domain. Moreover, all experimental observations are quantitatively validated by a simple model that takes into account the transverse manipulation of the optical phase via the space-variant form birefringence of subwavelength slits. © 2013 American Physical Society.

Yang Z.,University of Queensland | Taran E.,Australian National Fabrication Facility | Webb T.I.,University of Queensland | Lynch J.W.,University of Queensland
Biochemistry | Year: 2012

The glycine receptor is an anion-permeable member of the Cys-loop ion channel receptor family. Synaptic glycine receptors predominantly comprise pentameric α1β subunit heteromers. To date, attempts to define the subunit stoichiometry and arrangement of these receptors have not yielded consistent results. Here we introduced FLAG and six-His epitopes into α1 and β subunits, respectively, and imaged single antibody-bound α1β receptors using atomic force microscopy. This permitted us to infer the number and relative locations of the respective subunits in functional pentamers. Our results indicate an invariant 2α1:3β stoichiometry with a β-α-β-α-β subunit arrangement. © 2012 American Chemical Society.

Gensemer S.,CSIRO | Gross M.,Australian National Fabrication Facility
Optics Express | Year: 2015

Large, precision optics can now be manufactured with surface figures specified at the sub-nanometer level. However, coatings and gravity deform large optics, and there are limits to what can be corrected by clever compensation. Instead, deformations caused by stress from optical mounts and deposited coatings must be incorporated into the optical design. We demonstrate compensation of coating stress on a 370mm substrate to l=200 by a process of coating and annealing. We also model the same process and identify the leading effects that must be anticipated in fabrication of optics for future gravitational wave detectors and other applications of large, precisely figured optics, and identify the limitations inherent in using coatings to compensate for these deformations. © 2015 Optical Society of America.

Malinauskas M.,Vilnius University | Farsari M.,IESL FORTH | Piskarskas A.,Vilnius University | Juodkazis S.,Australian National Fabrication Facility | Juodkazis S.,Vilnius University
Physics Reports | Year: 2013

Research into the three-dimensional nanostructuring of photopolymers by ultrashort laser pulses has seen immense growth over the last decade. In this paper, we review the basic principles and the most important developments and applications of this technology. We discuss the mechanisms the linear and nonlinear light absorption at tight focusing conditions, and we present some typical laser writing conditions with numerical examples. The photochemistry of traditional and novel photopolymers together with strategies for their photosensitization for laser structuring by ultra-short pulses are discussed. We also discuss current and potential future applications in diverse fields such as metamaterials, plasmonics, micro-optics, and biomedical devices and implants. © 2013 Elsevier B.V.

News Article
Site: www.materialstoday.com

The Australian Institute for Nanoscale Science and Technology (AINST) has been officially opened in Sydney. The new AUS$150 million Sydney Nanoscience Hub will reportedly be most advanced facility for nanoscience in the region, where design, fabrication and testing of devices can occur under one roof. The award-winning Sydney Nanoscience Hub was co-funded with AUS$40 million from the federal government, includes teaching spaces alongside publicly available core research facilities that will support  fundamental research as well as the work of start-ups and established industry. The Institute hosts some of the capabilities of the Australian National Fabrication Facility and of the Australian Microscopy and Microanalysis Research Facility – both co-funded by the National Collaborative Research Infrastructure Strategy (NCRIS). Researchers at the Institute contribute to two Australian Council Centres of Excellence: CUDOS, the Centre for Ultrahigh bandwidth Devices for Optical Systems; and EQuS, the Centre for Engineered Quantum Systems. ‘The Australian Institute for Nanoscale Science and Technology continues the University of Sydney’s tradition in addressing multidisciplinary issues in a unique way to ensure that we are ready to solve the great challenges of science, engineering and beyond,’ said vice-chancellor Dr Michael Spence. This story is adapted from material from AINST, with editorial changes made by Materials Today. The views expressed in this article do not necessarily represent those of Elsevier.

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