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DTSTAMP:20260424T143113Z
UID:65818134dcfe7019056088@ist.ac.at
DTSTART:20240111T133000
DTEND:20240111T143000
DESCRIPTION:Speaker: Guanhao Huang\nhosted by Johannes Fink\nAbstract: Quan
 tum optics studies how photons interact with other forms of matter\, the u
 nderstanding of which was crucial for the development of quantum mechanics
  as a whole. Starting from the photoelectric effect\, the quantum property
  of light has led to the development of atomic physics\, laser science\, a
 nd nonlinear optics. Free-electron quantum optics studies the fundamental 
 interaction between a flying electron and quantum optical fields. The semi
 -classical interaction between free electrons and an intense laser field h
 as been well studied\, but the quantum nature of light remains elusive. Co
 herent cathodoluminescence\, by its energy-conserved nature\, can reveal t
 he quantum nature of electron-light interaction under the right measuremen
 t setting. In this talk\, we discuss the theoretical basis of the quantum 
 optical interaction between free electrons and light\, as well as the expe
 rimental platform we developed using integrated photonic circuits. With a 
 classical laser field\, we observe efficient stimulated free-electron inte
 raction with both linear and nonlinear optical fields\, as well as spatial
  features not directly accessible using optical means. When the cavity is 
 in a vacuum state\, the quantum nature of electron-photon interaction is r
 evealed in the form of coherent cathodoluminescence by analyzing the corre
 lations of particle coincidence\, thanks to complete control over the inpu
 t-output ports of the used photonic device\, as well as event-based electr
 on detectors.
LOCATION:Office Bldg West / Ground floor / Foyer seminar room (I21.EG.128)\
 , ISTA
ORGANIZER:swiddman@ist.ac.at
SUMMARY:Guanhao Huang: Interfacing free electrons and light using photonic 
 integrated circuits
URL:https://talks-calendar.ista.ac.at/events/4677
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