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SUMMARY:Electric-Dipole Quasiparticles for THz and Quantum Technologies
DTSTART:20251204T100000
DTEND:20251204T110000
DTSTAMP:20261007T080507Z
UID:ca198ceaaf5f1e43035069b25d0f6dc9773e2d0f908112c8822c84ca
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Jeongheon Choe\nCollective excitations in quantum material
 s offer powerful pathways to probe and control emergent phases. Ferroelect
 ric materials are predicted to host ferrons\, i.e. the electric-dipole ana
 logs of magnons\, but they have remained experimentally elusive. I will pr
 esent our discovery of coherent ferrons in the van der Waals ferroelectric
  NbOI2. Using ultrafast optical excitation\, we launch polarization waves 
 that propagate uniaxially at hypersonic velocities\, emit narrow-band tera
 hertz radiation\, and modulate the ferroelectric order parameter. These re
 sults establish a new platform narrow-band THz sources\, energy-efficient 
 information processing\, and coherent electric control in future quantum t
 echnologies.
LOCATION:CM 1 4 https://plan.epfl.ch/?room==CM%201%204 https://epfl.zoom.u
 s/j/61859854299
STATUS:CONFIRMED
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