Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40

Tianwu Wang, Elena A. Romonova, Nabil Abdel-Moneim, David Furniss, Anna Krolik, Zhuoqi Tang, Angela Seddon, Trevor Benson, Andrei Lavrinenko, Peter Uhd Jepsen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Broadband terahertz time domain spectroscopy (THz-TDS) and time resolved terahertz spectroscopy (TRTS) were performed on a 54 μm thick chalcogenide glass (As30Se30Te40) sample using a two-color laser induced air plasma THz system in transmission and reflection configurations, respectively. Two absorption modes were observed at 2–3 THz and 5–8 THz. The photo-induced conductivity can be well described by the Drude-Smith conductivity model, which shows significant carrier localization effects. A fast refractive index change was observed 100 fs before the conductivity reached its maximum with two orders of magnitude larger amplitude than expected for the optically induced THz Kerr effect, indicating that the free carriers are responsible for the transient index change.
Original languageEnglish
Title of host publicationProceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves
Number of pages1
PublisherIEEE
Publication date2016
Pages1-1
ISBN (Print)9781467384858
DOIs
Publication statusPublished - 2016
Event41st International Conference on Infrared, Millimeter and Terahertz Waves - Copenhagen, Denmark
Duration: 25 Sep 201630 Sep 2016
Conference number: 41

Conference

Conference41st International Conference on Infrared, Millimeter and Terahertz Waves
Number41
CountryDenmark
CityCopenhagen
Period25/09/201630/09/2016
Series International Conference on Infrared, Millimeter and Terahertz Waves
ISSN2162-2027

Keywords

  • Conductivity
  • Plasmas
  • Broadband communication
  • Spectroscopy
  • Glass
  • Absorption
  • Reflection

Cite this

Wang, T., Romonova, E. A., Abdel-Moneim, N., Furniss, D., Krolik, A., Tang, Z., ... Jepsen, P. U. (2016). Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40. In Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (pp. 1-1). IEEE. International Conference on Infrared, Millimeter and Terahertz Waves https://doi.org/10.1109/IRMMW-THz.2016.7758575
Wang, Tianwu ; Romonova, Elena A. ; Abdel-Moneim, Nabil ; Furniss, David ; Krolik, Anna ; Tang, Zhuoqi ; Seddon, Angela ; Benson, Trevor ; Lavrinenko, Andrei ; Jepsen, Peter Uhd. / Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40. Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves. IEEE, 2016. pp. 1-1 ( International Conference on Infrared, Millimeter and Terahertz Waves).
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title = "Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40",
abstract = "Broadband terahertz time domain spectroscopy (THz-TDS) and time resolved terahertz spectroscopy (TRTS) were performed on a 54 μm thick chalcogenide glass (As30Se30Te40) sample using a two-color laser induced air plasma THz system in transmission and reflection configurations, respectively. Two absorption modes were observed at 2–3 THz and 5–8 THz. The photo-induced conductivity can be well described by the Drude-Smith conductivity model, which shows significant carrier localization effects. A fast refractive index change was observed 100 fs before the conductivity reached its maximum with two orders of magnitude larger amplitude than expected for the optically induced THz Kerr effect, indicating that the free carriers are responsible for the transient index change.",
keywords = "Conductivity, Plasmas, Broadband communication, Spectroscopy, Glass, Absorption, Reflection",
author = "Tianwu Wang and Romonova, {Elena A.} and Nabil Abdel-Moneim and David Furniss and Anna Krolik and Zhuoqi Tang and Angela Seddon and Trevor Benson and Andrei Lavrinenko and Jepsen, {Peter Uhd}",
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Wang, T, Romonova, EA, Abdel-Moneim, N, Furniss, D, Krolik, A, Tang, Z, Seddon, A, Benson, T, Lavrinenko, A & Jepsen, PU 2016, Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40. in Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves. IEEE, International Conference on Infrared, Millimeter and Terahertz Waves, pp. 1-1, 41st International Conference on Infrared, Millimeter and Terahertz Waves, Copenhagen, Denmark, 25/09/2016. https://doi.org/10.1109/IRMMW-THz.2016.7758575

Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40. / Wang, Tianwu; Romonova, Elena A.; Abdel-Moneim, Nabil; Furniss, David; Krolik, Anna; Tang, Zhuoqi; Seddon, Angela; Benson, Trevor; Lavrinenko, Andrei; Jepsen, Peter Uhd.

Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves. IEEE, 2016. p. 1-1 ( International Conference on Infrared, Millimeter and Terahertz Waves).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40

AU - Wang, Tianwu

AU - Romonova, Elena A.

AU - Abdel-Moneim, Nabil

AU - Furniss, David

AU - Krolik, Anna

AU - Tang, Zhuoqi

AU - Seddon, Angela

AU - Benson, Trevor

AU - Lavrinenko, Andrei

AU - Jepsen, Peter Uhd

PY - 2016

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N2 - Broadband terahertz time domain spectroscopy (THz-TDS) and time resolved terahertz spectroscopy (TRTS) were performed on a 54 μm thick chalcogenide glass (As30Se30Te40) sample using a two-color laser induced air plasma THz system in transmission and reflection configurations, respectively. Two absorption modes were observed at 2–3 THz and 5–8 THz. The photo-induced conductivity can be well described by the Drude-Smith conductivity model, which shows significant carrier localization effects. A fast refractive index change was observed 100 fs before the conductivity reached its maximum with two orders of magnitude larger amplitude than expected for the optically induced THz Kerr effect, indicating that the free carriers are responsible for the transient index change.

AB - Broadband terahertz time domain spectroscopy (THz-TDS) and time resolved terahertz spectroscopy (TRTS) were performed on a 54 μm thick chalcogenide glass (As30Se30Te40) sample using a two-color laser induced air plasma THz system in transmission and reflection configurations, respectively. Two absorption modes were observed at 2–3 THz and 5–8 THz. The photo-induced conductivity can be well described by the Drude-Smith conductivity model, which shows significant carrier localization effects. A fast refractive index change was observed 100 fs before the conductivity reached its maximum with two orders of magnitude larger amplitude than expected for the optically induced THz Kerr effect, indicating that the free carriers are responsible for the transient index change.

KW - Conductivity

KW - Plasmas

KW - Broadband communication

KW - Spectroscopy

KW - Glass

KW - Absorption

KW - Reflection

U2 - 10.1109/IRMMW-THz.2016.7758575

DO - 10.1109/IRMMW-THz.2016.7758575

M3 - Article in proceedings

SN - 9781467384858

T3 - International Conference on Infrared, Millimeter and Terahertz Waves

SP - 1

EP - 1

BT - Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves

PB - IEEE

ER -

Wang T, Romonova EA, Abdel-Moneim N, Furniss D, Krolik A, Tang Z et al. Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40. In Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves. IEEE. 2016. p. 1-1. ( International Conference on Infrared, Millimeter and Terahertz Waves). https://doi.org/10.1109/IRMMW-THz.2016.7758575