Computational spectral imaging in the THz band
Lead Research Organisation:
University of Warwick
Department Name: Sch of Engineering
Abstract
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Organisations
Publications
Hooper I
(2022)
Engineering the carrier lifetime and switching speed in Si-based mm-wave photomodulators
in Journal of Applied Physics
Hooper IR
(2019)
High efficiency photomodulators for millimeter wave and THz radiation.
in Scientific reports
Mrnka M
(2023)
Terahertz imaging through emissivity control
in Optica
Wratten A
(2023)
Hafnium oxide: A thin film dielectric with controllable etch resistance for semiconductor device fabrication
in AIP Advances
| Description | The project has developed new silicon-based modulators for THz radiation. We have developed different ways of passivating the surfaces of silicon wafers in order to control the carrier density in the silicon, which affects the modulation response. Our initial study (https://doi.org/10.1038/s41598-019-54011-6) showed the impact of planar Al2O3 surface passivation layers grown by atomic layer deposition (ALD). This gave excellent modulation, but the long carrier lifetimes resulted in a relatively slow switching speed. A follow-up study showed it was possible to reach intermediate carrier lifetimes by patterning the surface passivation layers (https://doi.org/10.1063/5.0128234). The project has enabled new approaches for THz imaging using emissivity control (https://doi.org/10.1364/OPTICA.503936). |
| Exploitation Route | Others may use the outcomes to develop a range of THz-based systems for imaging. These could have uses in a range of sectors including security imaging and medical devices (e.g. for cancer diagnosis). |
| Sectors | Aerospace Defence and Marine Healthcare |
| Description | The project has developed new ways of modulating THz radiation based on passivating silicon wafers in different ways. The photomodulators produced have been demonstrated to be useful in the development of new techniques for THz imaging using emissivity control (https://doi.org/10.1364/OPTICA.503936). |
| First Year Of Impact | 2023 |
| Sector | Aerospace, Defence and Marine |
| Description | Terabotics - terahertz robotics for surgery and medicine |
| Amount | £8,000,773 (GBP) |
| Funding ID | EP/V047914/1 |
| Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
| Sector | Public |
| Country | United Kingdom |
| Start | 08/2021 |
| End | 08/2026 |