Mitrofanov, O;
Viti, L;
Giordano, MC;
Dardanis, E;
Ercolani, D;
Politano, A;
Sorba, L;
(2017)
Near-Field microscopy with phase sensitive coherent detection employing quantum cascade lasers.
In:
2017 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).
IEEE: Cancun, Mexico.
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Abstract
We demonstrate a novel architecture for a THz near-field probe, which enables coherent imaging with subwavelength spatial resolution using THz quantum cascade lasers. An InAs nanowire acting as a THz detector based on the field effect transistor concept is integrated inside a subwavelength input aperture of the near-field probe to detect intensity of the THz field and its phase. To determine the phase locally, the THz field is superimposed on the reference THz field incident on the aperture of the probe from the back side. In this configuration, the THz detector exhibits coherent gain and sensitivity to the relative phase between the local and the reference THz fields.
| Type: | Proceedings paper |
|---|---|
| Title: | Near-Field microscopy with phase sensitive coherent detection employing quantum cascade lasers |
| Event: | 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) |
| ISBN-13: | 9781509060481 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/IRMMW-THz.2017.8067244 |
| Publisher version: | https://doi.org/10.1109/IRMMW-THz.2017.8067244 |
| 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. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10113667 |
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