Hale, LL;
Jung, H;
Gennaro, SD;
Briscoe, J;
Harris, CT;
Luk, TS;
Addamane, SJ;
... Mitrofanov, O; + view all
(2022)
Nonlinear Terahertz Generation in Semiconductor Metasurfaces.
In:
2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).
IEEE: Delft, Netherlands.
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Abstract
We demonstrate ultra-thin semiconductor metasurfaces for generation of THz pulses. By investigating the dependence of the THz amplitude and phase on excitation field polarization and crystal orientation, we deduce that the underlying THz emission mechanism in metasurfaces differs from bulk semiconductor wafers with second order nonlinearity playing a dominant role. The metasurface enables control of the THz phase and can therefore be used to spatially structure the THz emitted field. We use this effect to design and demonstrate a metasurface which simultaneously emits and focusses THz pulses.
| Type: | Proceedings paper |
|---|---|
| Title: | Nonlinear Terahertz Generation in Semiconductor Metasurfaces |
| Event: | 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) |
| Dates: | 28 Aug 2022 - 2 Sep 2022 |
| ISBN-13: | 9781728194271 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/IRMMW-THz50927.2022.9895778 |
| Publisher version: | https://doi.org/10.1109/IRMMW-THz50927.2022.989577... |
| 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: | Crystals, Metasurfaces |
| 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/10158202 |
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