Conference paper
Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40
Department of Photonics Engineering, Technical University of Denmark1
Saratov State University2
University of Nottingham3
Metamaterials, Department of Photonics Engineering, Technical University of Denmark4
Ultrafast Infrared and Terahertz Science, Department of Photonics Engineering, Technical University of Denmark5
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.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2016 |
| Pages: | 1-1 |
| Proceedings: | 41st International Conference on Infrared, Millimeter and Terahertz Waves |
| Series: | International Conference on Infrared, Millimeter and Terahertz Waves |
| ISBN: | 1467384852 , 1467384860 , 9781467384858 and 9781467384865 |
| ISSN: | 21622035 and 21622027 |
| Types: | Conference paper |
| DOI: | 10.1109/IRMMW-THz.2016.7758575 |
| ORCIDs: | Lavrinenko, Andrei and Jepsen, Peter Uhd |
