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Efficiency Enhancement of Scattering Near-Field Probes

Siday, T; Mitrofanov, O; (2019) Efficiency Enhancement of Scattering Near-Field Probes. In: Proceedings of the 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE: Paris, France. Green open access

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Abstract

We measure, for the first time, the scattering efficiency of resonant terahertz (THz) probes for scattering-type THz near-field microscopy. We fabricate the probes by placing an indium 'antenna' directly on the tine of a quartz tuning fork (QTF), which we use as an atomic force microscope (AFM) probe in tapping mode. THz time-domain spectroscopy (TDS) of the THz field scattered from the probe shows that the scattering efficiency of the indium antenna exhibits resonant enhancement determined by the antenna length. These resonant scattering probes can enable THz near-field imaging applications where THz contrast is weak, such as 2D materials or biological systems.

Type: Proceedings paper
Title: Efficiency Enhancement of Scattering Near-Field Probes
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/IRMMW-THz.2019.8873922
Publisher version: https://doi.org/10.1109/IRMMW-THz.2019.8873922
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.
Keywords: Scattering , Probes , Indium , Antenna measurements , Microscopy , Resonant frequency , Quantum cascade lasers
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/10094127
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