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VERSION:2.0
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BEGIN:VEVENT
DTSTAMP:20260519T125227Z
UID:https://www.mpsd.mpg.de/events/8291/17181
DTSTART:20170111T100000Z
DTEND:20170111T113000Z
CLASS:PUBLIC
CREATED:20170105T081247Z
DESCRIPTION: Terahertz (THz) electromagnetic radiation is located in the ga
 p that separates the realms of electronics (&lt\;1 THz) and optics (&gt\;3
 0 THz). Sub-picosecond THz pulses are capable of probing and even controll
 ing numerous low-energy excitations such as phonons\, excitons and Cooper 
 pairs. Here\, we consider experiments showing that THz radiation is also a
  very useful and versatile tool in the fields of spintronics and ultrafast
  magnetism. First\, we optically launch ultrafast spin transport and study
  its conversion into charge currents by means of the inverse spin Hall eff
 ect [Nature Nanotech. 8\, 256 (2013)]. The charge current can be detected 
 by sampling the concomitantly emitted THz radiation. This approach allows 
 us to monitor ultrafast spin currents and provides a quick and easy estima
 te of the strength of the spin Hall effect in a contact-free manner. In ad
 dition\, optimization of the spintronic structure has led to new\, efficie
 nt and scalable emitters of THz pulses that fully cover the range from 1 t
 o 30 THz without gap [Nature Photon. 10\, 483 (2016)]. Second\, we address
  spin-lattice coupling by selective excitation of optical phonons in the m
 odel ferrimagnetic insulator Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> (YI
 G) and find a quenching of magnetic order on a time scale as short as 1 ps
 . This observation attests to a highly efficient coupling of crystal latti
 ce and electron spins in this material.\nSpeaker: Tobias Kampfrath
LAST-MODIFIED:20170105T085025Z
LOCATION:CFEL (Bldg. 99)\, Room: Seminar Room IV\, O1.111
ORGANIZER;CN=Sebastian Loth:mailto:
SUMMARY:MPSD Seminar:  Ultrafast spintronics with terahertz radiation 
URL;VALUE=URI:https://www.mpsd.mpg.de/events/8291/17181
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