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

doi:10.1109/IRMMW-THz.2016.7758575

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 proceeding › Article in proceedings › Research › peer-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 language	English
Title of host publication	Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves
Number of pages	1
Publisher	IEEE
Publication date	2016
Pages	1-1
ISBN (Print)	9781467384858
DOIs	https://doi.org/10.1109/IRMMW-THz.2016.7758575
Publication status	Published - 2016
Event	41st International Conference on Infrared, Millimeter and Terahertz Waves - Copenhagen, Denmark Duration: 25 Sept 2016 → 30 Sept 2016 Conference number: 41

Conference

Conference	41st International Conference on Infrared, Millimeter and Terahertz Waves
Number	41
Country/Territory	Denmark
City	Copenhagen
Period	25/09/2016 → 30/09/2016

Series	International Conference on Infrared, Millimeter and Terahertz Waves
ISSN	2162-2027

Keywords

Conductivity
Plasmas
Broadband communication
Spectroscopy
Glass
Absorption
Reflection

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10.1109/IRMMW-THz.2016.7758575

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Wang, T., Romonova, E. A., Abdel-Moneim, N., Furniss, D., Krolik, A., Tang, Z., Seddon, A., Benson, T., Lavrinenko, A., & 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. https://doi.org/10.1109/IRMMW-THz.2016.7758575

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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}",

year = "2016",

doi = "10.1109/IRMMW-THz.2016.7758575",

language = "English",

isbn = "9781467384858",

series = " International Conference on Infrared, Millimeter and Terahertz Waves",

publisher = "IEEE",

pages = "1--1",

booktitle = "Proceedings of 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves",

address = "United States",

note = "41st International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2016 ; Conference date: 25-09-2016 Through 30-09-2016",

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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 et al.
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 proceeding › Article in proceedings › Research › peer-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

N1 - Conference code: 41

PY - 2016

Y1 - 2016

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

T2 - 41st International Conference on Infrared, Millimeter and Terahertz Waves

Y2 - 25 September 2016 through 30 September 2016

ER -

Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40

Abstract

Conference

Keywords

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