Dr MITCHELL KENNEY's Outputs (10)

Roadmap on photonic metasurfaces (2024)
Journal Article
Schulz, S. A., Oulton, R. F., Kenney, M., Alù, A., Staude, I., Bashiri, A., …Fernandez-Corbaton, I. (2024). Roadmap on photonic metasurfaces. Applied Physics Letters, 124(26), Article 260701. https://doi.org/10.1063/5.0204694

Here we present a roadmap on Photonic metasurfaces. This document consists of a number of perspective articles on different applications, challenge areas or technologies underlying photonic metasurfaces. Each perspective will introduce the topic, pre... Read More about Roadmap on photonic metasurfaces.

Metasurface Optics With On-Axis Polarization Control for Terahertz Sensing Applications (2023)
Journal Article
Nowack, T. S., Shah, Y. D., Grant, J. P., Carranza, I. E., Kenney, M. G., Faccio, D., …Cumming, D. R. S. (2023). Metasurface Optics With On-Axis Polarization Control for Terahertz Sensing Applications. IEEE Transactions on Terahertz Science & Technology, 13(4), 373-380. https://doi.org/10.1109/TTHZ.2023.3263648

Nondestructive testing (NDT) and imaging of materials with unknown properties are important applications of terahertz technology. Different contrast-forming methods are available to obtain diverse information on the imaged region, including intensity... Read More about Metasurface Optics With On-Axis Polarization Control for Terahertz Sensing Applications.

Smart Surface Radio Environments (2022)
Journal Article
Gradoni, G., Di Renzo, M., Diaz-Rubio, A., Tretyakov, S., Caloz, C., Peng, Z., …Phang, S. (2022). Smart Surface Radio Environments. Reviews of Electromagnetics, 1, 1-42. https://doi.org/10.53792/roe/2022.1/21012

This Roadmap takes the reader on a journey through the research in electromagnetic wave propagation control via reconfigurable intelligent surfaces. Metasurface modelling and design methods are reviewed along with physical realisation techniques. Sev... Read More about Smart Surface Radio Environments.

Creating Composite Vortex Beams with a Single Geometric Metasurface (2022)
Journal Article
Ming, Y., Intaravanne, Y., Ahmed, H., Kenney, M., Lu, Y. Q., & Chen, X. (2022). Creating Composite Vortex Beams with a Single Geometric Metasurface. Advanced Materials, 34(18), Article 2109714. https://doi.org/10.1002/adma.202109714

Composite vortex beams (CVBs) have attracted considerable interest recently due to the unique optical properties and potential applications. However, these beams are mainly generated using spatial light modulators, which suffer from large volume, hig... Read More about Creating Composite Vortex Beams with a Single Geometric Metasurface.

Alignment-insensitive bilayer THz metasurface absorbers exceeding 100% bandwidth (2019)
Journal Article
Kenney, M., Grant, J., & Cumming, D. R. S. (2019). Alignment-insensitive bilayer THz metasurface absorbers exceeding 100% bandwidth. Optics Express, 27(15), 20886-20900. https://doi.org/10.1364/oe.27.020886

Metamaterial absorbers have been a topic of considerable interest in recent years, with a particular focus on Terahertz (THz) frequencies due to many natural materials having a weak interaction with THz light. Great efforts have aimed to expand such... Read More about Alignment-insensitive bilayer THz metasurface absorbers exceeding 100% bandwidth.

Amplitude Modulation of Anomalously Refracted Terahertz Waves with Gated-Graphene Metasurfaces (2017)
Journal Article
Kim, T.-T., Kim, H., Kenney, M., Park, H. S., Kim, H.-D., Min, B., & Zhang, S. (2018). Amplitude Modulation of Anomalously Refracted Terahertz Waves with Gated-Graphene Metasurfaces. Advanced Optical Materials, 6(1), Article 1700507. https://doi.org/10.1002/adom.201700507

Although recent progress in metasurfaces has shown great promise for applications, optical properties in metasurfaces are typically fixed by their structural geometry and dimensions. Here, an electrically controllable amplitude of anomalously‐refract... Read More about Amplitude Modulation of Anomalously Refracted Terahertz Waves with Gated-Graphene Metasurfaces.

Octave-Spanning Broadband Absorption of Terahertz Light Using Metasurface Fractal-Cross Absorbers (2017)
Journal Article
Kenney, M., Grant, J., Shah, Y. D., Escorcia-Carranza, I., Humphreys, M., & Cumming, D. R. S. (2017). Octave-Spanning Broadband Absorption of Terahertz Light Using Metasurface Fractal-Cross Absorbers. ACS Photonics, 4(10), 2604-2612. https://doi.org/10.1021/acsphotonics.7b00906

Synthetic fractals inherently carry spatially encoded frequency information that renders them as an ideal candidate for broadband optical structures. Nowhere is this more true than in the terahertz (THz) band where there is a lack of naturally occurr... Read More about Octave-Spanning Broadband Absorption of Terahertz Light Using Metasurface Fractal-Cross Absorbers.

Pancharatnam-Berry Phase Induced Spin-Selective Transmission in Herringbone Dielectric Metamaterials (2016)
Journal Article
Kenney, M., Li, S., Zhang, X., Su, X., Kim, T.-T., Wang, D., …Zhang, S. (2016). Pancharatnam-Berry Phase Induced Spin-Selective Transmission in Herringbone Dielectric Metamaterials. Advanced Materials, 28(43), 9567-9572. https://doi.org/10.1002/adma.201603460

A dielectric metamaterial approach for achieving spin‐selective transmission of electromagnetic waves is proposed. The design is based on spin‐controlled constructive or destructive interference between propagating phase and Pancharatnam–Berry phase.... Read More about Pancharatnam-Berry Phase Induced Spin-Selective Transmission in Herringbone Dielectric Metamaterials.

Ultracompact high-efficiency polarising beam splitter based on silicon nanobrick arrays (2016)
Journal Article
Zheng, G., Liu, G., Kenney, M. G., Li, Z., He, P., Li, S., …Deng, Q. (2016). Ultracompact high-efficiency polarising beam splitter based on silicon nanobrick arrays. Optics Express, 24(6), 6749-6757. https://doi.org/10.1364/OE.24.006749

Since the transmission of anisotropic nano-structures is sensitive to the polarisation of an incident beam, a novel polarising beam splitter (PBS) based on silicon nanobrick arrays is proposed. With careful design of such structures, an incident beam... Read More about Ultracompact high-efficiency polarising beam splitter based on silicon nanobrick arrays.

Metasurface holograms reaching 80% efficiency (2015)
Journal Article
Zheng, G., Mühlenbernd, H., Kenney, M., Li, G., Zentgraf, T., & Zhang, S. (2015). Metasurface holograms reaching 80% efficiency. Nature Nanotechnology, 10(4), 308-312. https://doi.org/10.1038/nnano.2015.2

Surfaces covered by ultrathin plasmonic structures—so-called metasurfaces—have recently been shown to be capable of completely controlling the phase of light, representing a new paradigm for the design of innovative optical elements such as ultrathin... Read More about Metasurface holograms reaching 80% efficiency.