Ann Roberts

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..

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

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..

Selective near-perfect absorbing mirror as a spatial frequency filter for optical image processing

Lukas Wesemann, Evgeniy Panchenko, Kalpana Singh, Enrico Della Gaspera, Daniel E Gomez, Timothy J Davis, Ann Roberts

Journal article  |  2019  |  APL Photonics

Spatial frequency filtering is a fundamental enabler of information processing methods in biological and technical imaging. Most f..

Ultracompact Camera Pixel with Integrated Plasmonic Color Filters

Evgeniy Panchenko, Lukas Wesemann, Daniel E Gomez, Timothy D James, Timothy Davis, Ann Roberts

Journal article  |  2019  |  Advanced Optical Materials

Photodetector size imposes a fundamental limit on the amount of information that can be recorded by an image sensor. Compact, high..

Simultaneous dual-contrast three-dimensional imaging in live cells via optical diffraction tomography and fluorescence

Chen Liu, Michael Malek, Ivan Poon, Lanzhou Jiang, Arif M Siddiquee, Colin JR Sheppard, Ann Roberts, Harry Quiney, Douguo Zhang, Xiaocong Yuan, Jiao Lin, Christian Depeursinge, Pierre Marquet, Shan Shan Kou

Journal article  |  2019  |  Photonics Research

We report a dual-contrast method of simultaneously measuring and visualizing the volumetric structural information in live biologi..

Plasmonic Near-Complete Optical Absorption and Its Applications

Charlene Ng, Lukas Wesemann, Evgeniy Panchenko, Jingchao Song, Timothy J Davis, Ann Roberts, Daniel E Gomez

Journal article  |  2019  |  Advanced Optical Materials

Near-complete absorption of light has the potential to underpin advances in photodetection, advanced chemistry, coloration of mate..

Metasurfaces with Asymmetric Optical Transfer Functions for Optical Signal Processing

TJ Davis, F Eftekhari, DE Gomez, A Roberts

Journal article  |  2019  |  PHYSICAL REVIEW LETTERS

Large-Area Nanofabrication of Partially Embedded Nanostructures for Enhanced Plasmonic Hot-Carrier Extraction

Charlene Ng, Peng Zeng, Julian A Lloyd, Debadi Chakraborty, Ann Roberts, Trevor A Smith, Udo Bach, John E Sader, Timothy J Davis, Daniel E Gomez

Journal article  |  2019  |  ACS Applied Nano Materials

When plasmonic nanoparticles are coupled with semiconductors, highly energetic hot carriers can be extracted from the metal-semico..