Mitrofanov, O;
Han, Z;
Ding, F;
Bozhevolnyi, SI;
Brener, I;
Reno, JL;
(2017)
Detection of internal fields in double-metal terahertz resonators.
Applied Physics Letters
, 110
(6)
, Article 061109. 10.1063/1.4975802.
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Abstract
Terahertz (THz) double-metal plasmonic resonators enable enhanced light-matter coupling by exploiting strong field confinement. The double-metal design however restricts access to the internal fields. We propose and demonstrate a method for spatial mapping and spectroscopic analysis of the internal electromagnetic fields in double-metal plasmonic resonators. We use the concept of image charges and aperture-type scanning near-field THz time-domain microscopy to probe the fields confined within the closed resonator. The experimental method opens doors to studies of light-matter coupling in deeply sub-wavelength volumes at THz frequencies.
| Type: | Article |
|---|---|
| Title: | Detection of internal fields in double-metal terahertz resonators |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.4975802 |
| Publisher version: | http://dx.doi.org/10.1063/1.4975802 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Applied, Physics, MICROCAVITIES, PROBE, ANTENNAS, WAVES |
| 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/1573056 |
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