Dean, P;
Mitrofanov, O;
Keeley, J;
Kundu, I;
Li, L;
Linfield, EH;
Davies, AG;
(2016)
Terahertz near-field microscopy using the self-mixing effect in a quantum cascade laser.
In:
2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).
IEEE: Copenhagen, Denmark.
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Abstract
We demonstrate terahertz (THz) apertureless nearfield microscopy exploiting the self-mixing effect in a quantum cascade laser (QCL). A THz wave is scattered by a sharp needle positioned above an object and coupled back into the QCL cavity resulting in detection of the THz near-field signal through the self-mixing effect. Using this technique we demonstrate twodimensional imaging at 2.53 THz with a spatial resolution of ︎ 1 µm – the highest image resolution achieved with a THz frequency QCL to date. This method offers an experimentally simple approach to coherent, high-resolution THz imaging.
| Type: | Proceedings paper |
|---|---|
| Title: | Terahertz near-field microscopy using the self-mixing effect in a quantum cascade laser |
| Event: | 41st International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) |
| Location: | Copenhagen, DENMARK |
| Dates: | 25 September 2016 - 30 September 2016 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/IRMMW-THz.2016.7758590 |
| Publisher version: | https://doi.org/10.1109/IRMMW-THz.2016.7758590 |
| 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/10113666 |
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