Mitrofanov, O;
Hale, LL;
Vabischevich, PP;
Siday, T;
Harris, CT;
Luk, TS;
Addamane, SJ;
... Brener, I; + view all
(2021)
Perfectly-absorbing photoconductive metasurfaces for THz applications.
In:
Proceedings of the 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
(pp. pp. 217-218).
IEEE: Buffalo, NY, USA.
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Abstract
Ultrafast switching of photoconductivity is essential for many terahertz (THz) technologies, however this process is inefficient. Recently developed concepts of all-dielectric metasurfaces can improve efficiency of ultrafast switches, overcoming material limitations, reducing the thickness of the photoconductive region and lowering optical power requirements for THz devices. We will consider two types of perfectly absorbing metasurfaces compatible with the photoconductive switch architecture and discuss performance of THz detectors with integrated metasurfaces. We will show that optical power level required for optimum operation for these THz detectors is more than one order of magnitude lower in comparison to devices without metasurfaces.
| Type: | Proceedings paper |
|---|---|
| Title: | Perfectly-absorbing photoconductive metasurfaces for THz applications |
| Event: | 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) |
| Location: | ELECTR NETWORK |
| Dates: | 10 Nov 2020 - 13 Nov 2020 |
| ISBN-13: | 978-1-7281-6620-9 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/IRMMW-THz46771.2020.9370692 |
| Publisher version: | https://doi.org/10.1109/IRMMW-THz46771.2020.937069... |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Optical switches, Detectors, Optical detectors, Metasurfaces, Ultrafast optics, Photoconductivity, Optical devices |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10158049 |
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