Broadband terahertz spectroscopy of chalcogenide glass As30Se30Te40

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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
Publication date2016
ISBN (Print)9781467384858
Publication statusPublished - 2016
Event41st International Conference on Infrared, Millimeter and Terahertz Waves - Copenhagen, Denmark
Duration: 25 Sep 201630 Sep 2016
Conference number: 41


Conference41st International Conference on Infrared, Millimeter and Terahertz Waves
Series International Conference on Infrared, Millimeter and Terahertz Waves
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

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

ID: 127659136