BEGIN:VCALENDAR
VERSION:2.0
PRODID:IEEE vTools.Events//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Denver
BEGIN:DAYLIGHT
DTSTART:20230312T030000
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3
TZNAME:MDT
END:DAYLIGHT
BEGIN:STANDARD
DTSTART:20231105T010000
TZOFFSETFROM:-0600
TZOFFSETTO:-0700
RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11
TZNAME:MST
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20240117T194753Z
UID:7E637E60-CF37-4383-995C-0021D0D82C9A
DTSTART;TZID=America/Denver:20230313T110000
DTEND;TZID=America/Denver:20230313T120000
DESCRIPTION:The wildly growing field of antiferromagnetic spintronics is cu
 rrently addressing several fundamental questions. A major topic of investi
 gation concerns the generation and manipulation of coherent magnons on the
  ultrafast timescale. The development of novel pulsed-laser sources has en
 abled scientists to address the following scientific question: which magne
 tic excited state can be induced by resonantly drive coherent magnons thro
 ughout the Brillouin zone? In my talk I will outline our approach to this 
 open issue\, which relies on the resonant drive of pairs of high-energy ma
 gnons in the weak ferromagnet α-Fe2O3\, with wavevector near the edges of
  the Brillouin zone. This unprecedented concept results in strongly pertur
 bing the entire magnetic system of the material\, in particular: i) magnon
  modes with different wavevectors are excited and amplified\; ii) the eige
 nfrequencies of magnons are modified\, which demonstrates a modification o
 f the magnon dispersion\; iii) coupling between magnon modes that are orth
 ogonal eigenstates of the magnetic Hamiltonian of the material is observed
 . All these groundbreaking observations are rationalised in view of a reso
 nant impulsive stimulated Raman scattering mechanism. The perspective of o
 ur results in terms of femtosecond coherent magnonics will be discussed.\n
 \nCo-sponsored by: UCCS\n\nSpeaker(s): Davide Bossini\n\nRoom: A204\, Bldg
 : Osborne Center for Science and Engineering\, 1420 Austin Bluffs Pkwy\, C
 olorado Springs\, Colorado\, United States\, 80918\, Virtual: https://even
 ts.vtools.ieee.org/m/400795
LOCATION:Room: A204\, Bldg: Osborne Center for Science and Engineering\, 14
 20 Austin Bluffs Pkwy\, Colorado Springs\, Colorado\, United States\, 8091
 8\, Virtual: https://events.vtools.ieee.org/m/400795
ORGANIZER:eiacocca@uccs.edu
SEQUENCE:5
SUMMARY:Femtosecond coherent magnonic manipulation of antiferromagnetism
URL;VALUE=URI:https://events.vtools.ieee.org/m/400795
X-ALT-DESC:Description: <br /><p>The wildly growing field of antiferromagne
 tic spintronics is currently addressing several fundamental questions. A m
 ajor topic of investigation concerns the generation and manipulation of co
 herent magnons on the ultrafast timescale. The development of novel pulsed
 -laser sources has enabled scientists to address the following scientific 
 question: which magnetic excited state can be induced by resonantly drive 
 coherent magnons throughout the Brillouin zone? In my talk I will outline 
 our approach to this open issue\, which relies on the resonant drive of pa
 irs of high-energy magnons in the weak ferromagnet &alpha\;-Fe<sub>2</sub>
 O<sub>3</sub>\, with wavevector near the edges of the Brillouin zone. This
  unprecedented concept results in strongly perturbing the entire magnetic 
 system of the material\, in particular: i) magnon modes with different wav
 evectors are excited and amplified\; ii) the eigenfrequencies of magnons a
 re modified\, which demonstrates a modification of the magnon dispersion\;
  iii) coupling between magnon modes that are orthogonal eigenstates of the
  magnetic Hamiltonian of the material is observed. All these groundbreakin
 g observations are rationalised in view of a resonant impulsive stimulated
  Raman scattering mechanism. The perspective of our results in terms of fe
 mtosecond coherent magnonics will be discussed.</p>
END:VEVENT
END:VCALENDAR