High-precision THz-TDS via self-referenced transmission echo method
High-precision THz-TDS via self-referenced transmission echo method
Terahertz time-domain spectroscopy (TDS) is a powerful characterization technique which allows for the frequency-dependent complex refractive index of a sample to be determined. This is achieved by comparing the time-domain of a pulse transmitted through air to a pulse transmitted through a material sample; however, the requirement for an independent reference scan can introduce errors due to laser fluctuations, mechanical drift, and atmospheric absorption. In this paper, we present a method for determining complex refractive index without an air reference, in which the first pulse transmitted through the sample is compared against the “echo”, where the internal reflections delay the transmission of the echo pulse. We present a benchmarking experiment in which the echo reference method is compared to the traditional air method, and show that the echo method is able to reduce variation in real refractive index.
6744-6750
Gorecki, Jonathan
6f68dd34-2d89-4063-baf6-8bb6cf8ccfe8
Klokkou, Nicholas T.
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Piper, Lewis, Kieran
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Mailis, Sakellaris
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Papasimakis, Nikitas
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Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
1 August 2020
Gorecki, Jonathan
6f68dd34-2d89-4063-baf6-8bb6cf8ccfe8
Klokkou, Nicholas T.
28e68acd-c66f-495f-87f3-91235fe03503
Piper, Lewis, Kieran
85fa16d7-a404-44c8-a1a3-58aeed164b3d
Mailis, Sakellaris
9fcc2cc8-9c00-452e-b785-a20263cfb33b
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Apostolopoulos, Vasileios
8a898740-4c71-4040-a577-9b9d70530b4d
Gorecki, Jonathan, Klokkou, Nicholas T., Piper, Lewis, Kieran, Mailis, Sakellaris, Papasimakis, Nikitas and Apostolopoulos, Vasileios
(2020)
High-precision THz-TDS via self-referenced transmission echo method.
Applied Optics, 59 (22), .
(doi:10.1364/AO.391103).
Abstract
Terahertz time-domain spectroscopy (TDS) is a powerful characterization technique which allows for the frequency-dependent complex refractive index of a sample to be determined. This is achieved by comparing the time-domain of a pulse transmitted through air to a pulse transmitted through a material sample; however, the requirement for an independent reference scan can introduce errors due to laser fluctuations, mechanical drift, and atmospheric absorption. In this paper, we present a method for determining complex refractive index without an air reference, in which the first pulse transmitted through the sample is compared against the “echo”, where the internal reflections delay the transmission of the echo pulse. We present a benchmarking experiment in which the echo reference method is compared to the traditional air method, and show that the echo method is able to reduce variation in real refractive index.
Text
Echo Reference
- Accepted Manuscript
More information
Accepted/In Press date: 28 April 2020
Published date: 1 August 2020
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Publisher Copyright:
© 2020 OSA - The Optical Society. All rights reserved.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Identifiers
Local EPrints ID: 441083
URI: http://eprints.soton.ac.uk/id/eprint/441083
ISSN: 1559-128X
PURE UUID: 91ca5413-bb60-4696-ba31-c3e044ad2994
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Date deposited: 29 May 2020 16:31
Last modified: 17 Mar 2024 05:36
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Contributors
Author:
Jonathan Gorecki
Author:
Lewis, Kieran Piper
Author:
Sakellaris Mailis
Author:
Nikitas Papasimakis
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