Maussang, K, Palomo, J, Manceau, J-M et al. (8 more authors) (2017) Monolithic echo-less photoconductive switches for high-resolution terahertz time-domain spectroscopy. In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. IRMMW-THz 2017, 27 Aug - 01 Sep 2017, Cancun, Mexico. IEEE ISBN 978-1-5090-6050-4
Abstract
Interdigitated photoconductive (IPC) switches are convenient sources and detectors for terahertz (THz) time domain spectroscopy. However, reflection of the emitted or detected radiation within the device substrate can lead to echoes that inherently limits the spectroscopic resolution achievable. In this work, we design and realize low-temperature-grown-GaAs (LT-GaAs) IPC switches for THz pulse generation and detection that suppresses such unwanted echoes. This is realized through a monolithic geometry of an IPC switch with a metal plane buried at a subwavelength depth below the LT-GaAs surface. Using this device as a detector, and coupling it to an echo-less IPC source, enables echo-free THz-TDS and high-resolution spectroscopy, with a resolution limited only by the temporal length of the measurement governed by the mechanical delay line used.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2017, 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: | Spectroscopy, Metals, Detectors, Substrates, Time-domain analysis, Geometry, Gallium arsenide |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Dec 2017 12:24 |
Last Modified: | 18 Jan 2018 10:10 |
Status: | Published |
Publisher: | IEEE |
Identification Number: | 10.1109/IRMMW-THz.2017.8067023 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:125236 |