Giordano, MC, Mastel, S, Liewald, C et al. (12 more authors) (2018) Phase-resolved terahertz self-detection near-field microscopy. Optics Express, 26 (14). pp. 18423-18435.
Abstract
At terahertz (THz) frequencies, scattering-type scanning near-field optical microscopy (s-SNOM) based on continuous wave sources mostly relies on cryogenic and bulky detectors, which represents a major constraint for its practical application. Here, we devise a THz s-SNOM system that provides both amplitude and phase contrast and achieves nanoscale (60-70nm) in-plane spatial resolution. It features a quantum cascade laser that simultaneously emits THz frequency light and senses the backscattered optical field through a voltage modulation induced inherently through the self-mixing technique. We demonstrate its performance by probing a phonon-polariton-resonant CsBr crystal and doped black phosphorus flakes.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved. |
Keywords: | (180.4243) Near-field microscopy; (180.5810) Sca nning microscopy; (140.5965) Semiconductor lasers, quantum cascade; (110.6795) Terahertz imaging; (110.3175) Interferometric imaging; (310.6628) Subwavelength structures, nanostructures. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/J017671/1 EPSRC EP/P021859/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Jul 2018 11:32 |
Last Modified: | 25 Jun 2023 21:25 |
Status: | Published |
Publisher: | Optical Society of America (OSA) |
Identification Number: | 10.1364/OE.26.018423 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:133216 |