PGI Kolloquium: Prof. Dr. Tobias Kampfrath, FU Berlin & Fritz Haber Institute, Berlin, Germany

Online Talk

Please note: You will receive the link to the online talk in the e-mail invitation, usually sent out a few days before the lecture takes place. It is also available on request from the contact person below.

Probing Ultrafast Spin Transport with Terahertz Electromagnetic Pulses

To take advantage of the electron spin in future electronics, spin angular momentum needs to be transported and detected. Electric fields and temperature gradients have been shown to efficiently drive spin transport at megahertz and gigahertz frequencies.

However, to probe the initial elementary steps that lead to the formation of spin currents, we need to launch and measure transport on much faster, that is, on femtosecond time scales. This goal is achieved by employing

both ultrashort optical and terahertz electromagnetic pulses.

We show that this experimental strategy provides new insights into important spintronic phenomena such as the spin Seebeck effect, spin-to-charge-current conversion and anisotropic magnetoresistance. Interesting photonic applications such as the efficient generation of ultrashort terahertz electromagnetic pulses will also be addressed.

References

[1] Seifert et al., Nature Comm. 9, Article number: 2899 (2018)
[2] O. Gueckstock et al., Advanced Materials 2006281 (2021)
[3] Seifert et al., Nature Photon. 10, 483 (2016)
[4] Fülöp et al., Advanced Optical Materials 1900681 (2019)

Kontakt

Daniel Bürgler

Telefon: +49 2461 61-4214

Fax:  +49 2461 61-4443

E-Mail: d.buergler@fz-juelich.de