New research reveals colour flip

A new paper led by PhD student Niken Priscilla reveals an intriguing device which exhibits a different colour variation when observed from either side. Unlike previous research the structure involves four simple nanoscale thickness layers of silica, silver and chromium. The research has been published in Advanced Photonics Research – link here.

Thin film device viewed from either side. Green light is transmitted independently of which surface is illuminated .

Alex Wood awarded Woodward Medal

Dr Alexander Wood is the recipient of the 2021 Woodward Medal in Science and Technology for his suite of publications in Nature Physics, Science Advances and Physical Review Letters concerning how physical rotation can be used as a tool for control and measurement of a quantum system. The Woodward Medal was established to reward outstanding and original scholarship. Congratulations, Alex!

New paper on polarisation-insensitive, scalable plasmonic colouration

Silicon mold (left) and resulting nanoimprinted structure (right).

Faris Shahidan has led new work appearing today in Optics Express. Using nanoimprint lithography we show that it is possible to generate vivid colouration without the requirement for polarised light. Embossed polymers are coated with a variety of metals permitting an investigation of the role of the choice of metal. This work opens up the prospects for applications in manufacturing and elsewhere. Link to paper (open access) here.

Congratulations to Dr Faris Shahidan

Congratulations to Dr Shahidan whose PhD was awarded on 31 August! From his citation his contributions to the field involved the investigation of novel approaches to generating nanostructured surface colouration. He showed that nanoimprint lithography can produce complex three-dimensional nanostructures over large areas and at scale critical to adoption of structural colour technologies. His work underpins new approaches for producing environmentally conscious colour films for consumer goods and next-generation security features.

Dr Shahidan and Professor Roberts enjoying a remote catch-up!

TMOS seeking PhD and masters students

The ARC Centre of Excellence for Transformative Meta-Optical Systems is now seeking expressions of interest from suitably qualified candidates for MSc (coursework) and PhD positions. By harnessing the disruptive concept of meta-optics TMOS will develop the next generation of ultra-compact optical systems with fundamentally new and exciting capabilities.

If you are interested in joining the Melbourne node in 2022 as either a PhD or MSc student contact Professor Ken Crozier or Professor Ann Roberts.

Potential project details here. More information about TMOS here.

Actively variable-spectrum optoelectronics with black phosphorus

Nima Azar, Sivacarendran Balendhran and Ken Crozier are co-authors on a Nature paper with colleagues from the University of California at Berkeley and the Lawrence Berkeley National Lab. They made use of the extraordinary sensitivity of the bandgap of black phosphorous (bP) to strain to show the continuous and reversible tuning of the operating wavelengths in bP light-emitting diodes and photodetectors.

Link to paper:

New article on optical nanotweezers designed by computer algorithm

Neuton’s paper on algorithm-designed plasmonic apertures for optical nanotweezers has been published in Advanced Optical Materials. The apertures were fabricated using a helium ion microscope and were characterised by cathodoluminescence and optical trapping experiments. It was shown that at every laser intensity, an algorithm-designed structure can outperform a conventional plasmonic aperture.

Link to paper:

Ann Roberts awarded Alan Walsh Medal

TMOS Chief Investigator Ann Roberts has been awarded the Alan Walsh Medal for 2020 by the Australian Institute of Physics (AIP).

Professor Roberts, a member of the University of Melbourne’s School of Physics, received the award in recognition of her outstanding contribution to the fields of plasmonics, nanophotonics, and optics.

Exciton Science Associate acknowledgment:

Number of posts found: 67