Siday, T;
Natrella, M;
Wu, J;
Liu, H;
Mitrofanov, O;
(2018)
Resonant scattering probes for terahertz near-field microscopy.
In: Razeghi, M and Brown, GJ and Lewis, JS and Leo, G, (eds.)
Quantum Sensing and Nano Electronics and Photonics XV.
(pp. 1054020:1-1054020:7).
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Abstract
We propose and demonstrate a scattering-type near-field probe, designed to increase the sensitivity of high-resolution scattering probe microscopy at terahertz (THz) frequencies. For efficient scattering of THz radiation, the probe, fabricated from indium, is designed to resonate like a dipole antenna. Efficient excitation is achieved by integrating the probe with a radially-polarized THz source. Using time-domain spectroscopy (TDS), we observe resonant enhancement of the scattered fields, and using aperture-type near-field microscopy, we see high field confinement at the scattering probe apex.
| Type: | Proceedings paper |
|---|---|
| Title: | Resonant scattering probes for terahertz near-field microscopy |
| Event: | SPIE OPTO 2018, 27 January - 1 February 2018, San Francisco, California, USA |
| ISBN-13: | 9781510615656 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2290903 |
| Publisher version: | https://doi.org/10.1117/12.2290903 |
| Language: | English |
| Additional information: | This is the published version of record. 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/10053890 |
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