Kenney, M. , Grant, J. , Shah, Y. D. , Escorcia-Carranza, I. , Humphreys, M. and Cumming, D. (2017) Fractal Metasurface Absorbers with Octave-Spanning Bandwidth. Nanophotonics and Micro/Nano Optics International Conference (Nanop 2017), Barcelona, Spain, 11-13 Sep 2017.
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Image (Poster Presentation)
155001.pdf - Presentation 2MB |
Publisher's URL: http://programme.exordo.com/nanop2017/delegates/presentation/185/
Abstract
Synthetic fractals offer a degree of freedom for varying resonance frequency, and are an ideal candidate for broadband absorbing devices – especially in the terahertz (THz) band where there is a lack of naturally absorbing materials. Metasurface absorbers often suffer from poor broadband performance, whilst strongly-absorbing broadband devices are typically complex multilayer structures [1,2]. Here, we overcome this limitation by developing an ultra-broadband metasurface absorber based on fractal cross resonators [3], capable of experimentally achieving one Optical Octave bandwidth and peak absorption of 93%. We attribute this to a novel absorption mechanism based on both Salisbury screen and anti-reflection responses. Such work is beneficial in realising THz blackbody absorbers, and for bolometric sensing capabilities.
| Item Type: | Conference or Workshop Item |
|---|---|
| Keywords: | Metasurfaces, absorber, metamaterial, fractal. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Cumming, Professor David and Humphreys, Mark and Grant, Dr James and Shah, Dr Yash Diptesh and Kenney, Dr Mitchell Guy and Escorcia Carranza, Dr Ivonne |
| Authors: | Kenney, M., Grant, J., Shah, Y. D., Escorcia-Carranza, I., Humphreys, M., and Cumming, D. |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Research Group: | Microsystem Technology Group |
| Copyright Holders: | Copyright © 2017 The Authors |
| Publisher Policy: | Reproduced with the permission of the Authors |
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