Ann Roberts

Meta-optical and thin film devices for all-optical information processing

Lukas Wesemann, Timothy J Davis, Ann Roberts

Journal article  |  2021  |  APPLIED PHYSICS REVIEWS

All-optical spatial frequency filtering has a long history with many applications now commonly replaced with digital alternatives...

Algorithm-Designed Plasmonic Nanotweezers: Quantitative Comparison by Theory, Cathodoluminescence, and Nanoparticle Trapping

Neuton Li, Jasper Cadusch, Amelia Liu, Anders J Barlow, Ann Roberts, Kenneth B Crozier

Journal article  |  2021  |  ADVANCED OPTICAL MATERIALS

Plasmonic apertures permit optical fields to be concentrated into sub-wavelength regions. This enhances the optical gradient force..

Near-Perfect Absorption of Light by Coherent Plasmon-Exciton States

Daniel E Gomez, Xu Shi, Tomoya Oshikiri, Ann Roberts, Hiroaki Misawa

Journal article  |  2021  |  NANO LETTERS

We experimentally demonstrate and theoretically study the formation of coherent plasmon-exciton states which exhibit absorption of..

Nanophotonics enhanced coverslip for phase imaging in biology

Lukas Wesemann, Jon Rickett, Jingchao Song, Jieqiong Lou, Elizabeth Hinde, Timothy J Davis, Ann Roberts

Journal article  |  2021  |  LIGHT-SCIENCE & APPLICATIONS

The ability to visualise transparent objects such as live cells is central to understanding biological processes. Here we experime..

Direct Assembly of Vertically Oriented, Gold Nanorod Arrays

Heyou Zhang, Yawei Liu, Muhammad Faris Shahin Shahidan, Calum Kinnear, Fatemeh Maasoumi, Jasper Cadusch, Eser Metin Akinoglu, Timothy D James, Asaph Widmer-Cooper, Ann Roberts, Paul Mulvaney

Journal article  |  2021  |  ADVANCED FUNCTIONAL MATERIALS

Although many nanoscale materials such as quantum dots and metallic nanocrystals exhibit size dependent optical properties, it has..

Optical Metasurfaces for Processing of Amplitude and Phase Images

Lukas Wesemann, Jon Rickett, Jingchao Song, Timothy J Davis, Ann Roberts

Conference Proceedings  |  2021  |  Conference on Lasers and Electro-Optics

Concealed Structural Colors Uncovered by Light Scattering

Eser Metin Akinoglu, Jingchao Song, Calum Kinnear, Yafei Xue, Heyou Zhang, Ann Roberts, Juergen Koehler, Paul Mulvaney

Journal article  |  2020  |  ADVANCED OPTICAL MATERIALS

Unusual structural colors are demonstrated in thin-film coatings due to a combination of optical interference and light scattering..

Self-Assembly of Plasmonic Near-Perfect Absorbers of Light: The Effect of Particle Size

Gus O Bonin, Steven J Barrow, Timothy U Connell, Ann Roberts, Anthony SR Chesman, Daniel E Gomez

Journal article  |  2020  |  JOURNAL OF PHYSICAL CHEMISTRY LETTERS

Structures capable of perfect light absorption promise technological advancements in varied applications, including sensing, optoe..

Multilevel nanoimprint lithography with a binary mould for plasmonic colour printing

Muhammad Faris Shahin Shahidan, Jingchao Song, Timothy D James, Ann Roberts

Journal article  |  2020  |  NANOSCALE ADVANCES

Pigment-free colouration based on plasmonic resonances has recently attracted considerable attention for potential in manufacturin..

On-chip optical image processing with plasmonic metasurfaces

Lukas Wesemann, Timothy Davis, Ann Roberts

Conference Proceedings  |  2020  |  2020 CONFERENCE ON LASERS AND ELECTRO-OPTICS PACIFIC RIM (CLEO-PR)

We propose the utilization of plasmonic resonant wave-guide gratings for ultracompact image processing in transmission. We experim..