Dean, P, Mitrofanov, O, Keeley, J orcid.org/0000-0001-5251-6648 et al. (4 more authors) (2016) Terahertz near-field microscopy using the self-mixing effect in a quantum cascade laser. In: 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz) 2016, 25-30 Sep 2016, Copenhagen, Denmark. IEEE ISBN 9781467384858
Abstract
We demonstrate terahertz (THz) apertureless near-field microscopy exploiting the self-mixing effect in a quantum cascade laser (QCL). A THz wave is scattered by a sharp needle positioned above an object and coupled back into the QCL cavity resulting in detection of the THz near-field signal through the self-mixing effect. Using this technique we demonstrate two-dimensional imaging at 2.53 THz with a spatial resolution of 1 μm - the highest image resolution achieved with a THz frequency QCL to date. This method offers an experimentally simple approach to coherent, high-resolution THz imaging.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
Keywords: | Quantum cascade lasers; Needles; Spatial resolution; Cavity resonators; Microscopy |
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/J002356/1 Royal Society WM110032 EPSRC EP/J017671/1 Royal Society WM150029 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 Jan 2017 12:17 |
Last Modified: | 20 Jan 2018 00:14 |
Published Version: | https://doi.org/10.1109/IRMMW-THz.2016.7758590 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/IRMMW-THz.2016.7758590 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110176 |