Mitrofanov, O;
Han, Z;
Ding, F;
Bozhevolnyi, SI;
Brener, I;
Reno, JL;
(2017)
Spectroscopy and mapping of resonant fields in terahertz plasmonic resonators.
In: Razeghi, M, (ed.)
Quantum Sensing and Nano Electronics and Photonics XIV.
(pp. 101110R1-101110R7).
SPIE
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Abstract
Plasmonic terahertz (THz) resonators provide a promising route for exploring strong light-matter coupling phenomena. Double-metal resonator designs in particular enable strong enhancement of the THz field and provide well-defined field orientation and confinement within a sub-wavelength size volume. The strong field confinement however limits access to the internal fields essential for investigations of light-matter coupling. We propose and investigate a method for mapping and spectroscopic analysis of the internal fields in double-metal plasmonic THz resonators. We use aperture-type scanning near-field THz microscopy to access strongly confined fields with sub-wavelength spatial resolution of ~5 μm (~λ/100). Combined with the THz time-domain spectroscopy technique, the near-field method allows us to perform spectroscopic studies and investigate the field evolution inside the resonator. This experimental method opens doors to studies of strong light-matter coupling at THz frequencies in individual plasmonic resonators.
| Type: | Proceedings paper |
|---|---|
| Title: | Spectroscopy and mapping of resonant fields in terahertz plasmonic resonators |
| Event: | SPIE OPTO 2017: Conference on Quantum Sensing and Nano Electronics and Photonics XIV, 28 January - 2 February 2017, San Francisco, California, United States |
| Location: | San Francisco, CA |
| Dates: | 29 January 2017 - 02 February 2017 |
| ISBN-13: | 9781510606630 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2254416 |
| Publisher version: | http://dx.doi.org/10.1117/12.2254416 |
| 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. |
| Keywords: | terahertz, near-field microscopy, terahertz time-domain spectroscopy, plasmons, resonators, light-matter coupling, metamaterials |
| 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/1573058 |
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