Event details

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Title: FWI Institutskolloquium: Laser terahertz emission nanoscopy
Category: Colloquium
Begin: 25.06.2019 11:00
End: 25.06.2019 12:00
Speaker: Prof. Daniel M. Mittleman, Brown University, Providence, RI, USA
Contact: Prof. Manfred Helm (2260), Susann Gebel (2345)
Location: -
Content: !!! The talk is "integrated" into the Ion Beam Workshop and will take place in the large lecture hall, probably at 10:30. Abstract: Laser terahertz emission spectroscopy has become a standard tool in the nonlinear optics toolbox. In this process, excitation of a sample by a femtosecond optical pulse produces a picosecond burst of terahertz radiation as a signature of ultrafast charge carrier dynamics. This versatile optical technique can provide valuable information about the initial phases of carrier motion immediately following photoexcitation. Yet, this and similar terahertz spectroscopy techniques are all limited in their spatial resolution by diffraction, making it very challenging to study nanomaterials with terahertz techniques. In this talk, we review terahertz spectroscopy and applications, and then discuss the development of new techniques to access information about nanoscale systems.