Overview

My research is based around the novel fabrication and function of electromagnetic metamaterials. This means that I look to make these materials in new ways, demonstrate new effects and use them for new applications. 

Some of the key areas I am interested in currently are:

• Broadband metamaterials based on interlaced meshes.
• Self-folding, (or shape morphing) materials based on origami or kirigami concepts.
• Materials with extraordinary electromagnetic scattering behaviours for radar detection/deception and antenna design.
• Metamaterials for RFID and lnternet of Things.
• Fabrication of metamaterials using additive manufacturing and 3D weaving.

If you would like to know more about my work then please feel free to drop me an email. 

I am a member of Exeter's Centre of Metamaterials Research and Innovation and the associated doctoral training centre for PhD students.

If you are interested in undertaking a PhD with me or one of our other academics, please see here for a list of opportunities, and get in touch or apply now.

I am also a member of the leadership team for the UK Metamaterials Network, which is a community of over 600 university academics, and industry and governmenal scientists and engineers. If you are a student, postdoc, academic or industry employee, please join our community and engage with our events and activities. 

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Publications

_{Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.}

| 2024 | 2023 | 2022 | 2021 | 2020 | 2018 | 2016 | 2015 | 2014 | 2013 |

2024

• Powell AW, Whittaker TE, Whittow WG, Sambles JR, Hibbins AP. (2024) Demonstration and Control of “Spoof-Plasmon” Scattering from 3D Spherical Metaparticles, ACS Photonics, volume 11, no. 3, pages 1156-1162, DOI:10.1021/acsphotonics.3c01617. [PDF]
• Capers J, Stanfield L, Sambles J, Boyes S, Powell A, Hibbins A, Horsley S. (2024) Multiscale design of large and irregular metamaterials, Physical Review Applied, DOI:10.1103/PhysRevApplied.21.014005.

2023

• Smellie D, Scott BA, Powell AW. (2023) Shape-Morphing Polymers for Tunable Frequency Selective Surfaces and Reflectarray Elements, 2023 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 5th - 9th Nov 2023, 2023 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), DOI:10.1109/imoc57131.2023.10379691. [PDF]
• Mikhailovskaya A, Vovchuk D, Grotov K, Kolchanov DS, Dobrykh D, Ladutenko K, Bobrovs V, Powell A, Belov P, Ginzburg P. (2023) Coronavirus-like all-angle all-polarization broadband scatterer, Communications Engineering, volume 2, no. 1, article no. 76, DOI:10.1038/s44172-023-00116-w. [PDF]
• Finlayson ED, Gallagher CP, Whittaker T, Goulas A, Engstrøm DS, Whittow W, Sambles JR, Hibbins AP, Powell AW. (2023) Microwave backscatter enhancement using radial anisotropy in biomimetic core-shell spheres, Applied Physics Letters, volume 122, no. 25, DOI:10.1063/5.0152735. [PDF]
• Stanfield LD, Powell AW, Horsley SAR, Sambles JR, Hibbins AP. (2023) Microwave demonstration of Purcell effect enhanced radiation efficiency, Sci Rep, volume 13, no. 1, DOI:10.1038/s41598-023-32066-w. [PDF]
• Whittaker T, Zhang S, Powell A, Stevens CJ, Vardaxoglou JYC, Whittow W. (2023) 3D Printing Materials and Techniques for Antennas and Metamaterials: A survey of the latest advances, IEEE Antennas and Propagation Magazine, volume 65, no. 3, pages 10-20, DOI:10.1109/MAP.2022.3229298.

2022

• Stanfield LD, Powell AW, Horsley SAR, Sambles JR, Hibbins AP. (2022) Microwave Demonstration of Purcell Effect Enhanced Radiation Efficiency. [PDF]
• Powell AW, Capers JR, Horsley SAR, Sambles JR, Hibbins AP. (2022) 3D printed metaparticles based on platonic solids for isotropic, multimode microwave scattering, 2022 16th European Conference on Antennas and Propagation, EuCAP 2022.
• Powell AW, Stavrinadis A, Christodoulou S, Quidant R, Konstantatos G. (2022) On-Demand Activation of Photochromic Nanoheaters for High Color Purity 3D Printing, DOI:10.48550/arxiv.2203.13584.

2021

• Powell AW, Mrnka M, Hibbins AP, Sambles JR. (2021) Superscattering and Directive Antennas via Mode Superposition in Subwavelength Core-Shell Meta-Atoms, Photonics, volume 9, no. 1, pages 6-6, DOI:10.3390/photonics9010006. [PDF]
• Powell AW, Hibbins AP, Sambles JR. (2021) Multiband superbackscattering via mode superposition in a single dielectric particle, Applied Physics Letters, volume 118, no. 25, DOI:10.1063/5.0054725. [PDF]
• Powell AW, Mitchell-Thomas RC, Zhang S, Cadman DA, Hibbins AP, Sambles JR. (2021) Dark Mode Excitation in Three-Dimensional Interlaced Metallic Meshes, ACS Photonics, volume 8, no. 3, pages 841-846, DOI:10.1021/acsphotonics.0c01811. [PDF]

2020

• Powell AW, Stavrinadis A, Christodoulou S, Quidant R, Konstantatos G. (2020) On-Demand Activation of Photochromic Nanoheaters for High Color Purity 3D Printing, NANO LETTERS, volume 20, no. 5, pages 3485-3491, DOI:10.1021/acs.nanolett.0c00414. [PDF]
• Powell AW, Ware J, Beadle JG, Cheadle D, Loh TH, Hibbins AP, Sambles JR. (2020) Strong, omnidirectional radar backscatter from subwavelength, 3D printed metacubes, IET Microwaves, Antennas & Propagation, volume 14, no. 14, pages 1862-1868, DOI:10.1049/iet-map.2020.0178. [PDF]

2018

• Powell AW, Stavrinadis A, De Miguel I, Konstantatos G, Quidant R. (2018) White and Brightly Colored 3D Printing Based on Resonant Photothermal Sensitizers, Nano Letters, volume 18, no. 11, pages 6660-6664, DOI:10.1021/acs.nanolett.8b01164.

2016

• Powell AW, Coles DM, Taylor RA, Watt AAR, Assender HE, Smith JM. (2016) Sensors: Plasmonic Gas Sensing Using Nanocube Patch Antennas (Advanced Optical Materials 4/2016), Advanced Optical Materials, volume 4, no. 4, pages 644-644, DOI:10.1002/adom.201670023. [PDF]
• Powell AW, Coles DM, Taylor RA, Watt AAR, Assender HE, Smith JM. (2016) Plasmonic Gas Sensing Using Nanocube Patch Antennas, ADVANCED OPTICAL MATERIALS, volume 4, no. 4, pages 634-642, DOI:10.1002/adom.201500602. [PDF]
• Powell AW, Smith JM. (2016) Mediating Fano losses in plasmonic scatterers by tuning the dielectric environment, APPLIED PHYSICS LETTERS, volume 109, no. 12, article no. ARTN 121107, DOI:10.1063/1.4962945. [PDF]
• Flatten LC, He Z, Coles DM, Trichet AAP, Powell AW, Taylor RA, Warner JH, Smith JM. (2016) Room-temperature exciton-polaritons with two-dimensional WS2. [PDF]

2015

• Powell A, Watt A, Assender H, Smith JM. (2015) Subwavelength Sensing Elements from Film-Coupled Silver Nanocubes, CLEO: QELS_Fundamental Science, CLEO: 2015, DOI:10.1364/cleo_qels.2015.ftu4e.6. [PDF]

2014

• Powell AW, Hjerrild N, Watt AAR, Assender HE, Smith JM. (2014) Directional plasmonic scattering from metal nanoparticles in thin-film environments, APPLIED PHYSICS LETTERS, volume 104, no. 8, article no. ARTN 081110, DOI:10.1063/1.4866669. [PDF]

2013

• Powell AW, Wincott MB, Watt AAR, Assender HE, Smith JM. (2013) Controlling the optical scattering of plasmonic nanoparticles using a thin dielectric layer, JOURNAL OF APPLIED PHYSICS, volume 113, no. 18, article no. ARTN 184311, DOI:10.1063/1.4804964. [PDF]

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