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URL:https://murmitoyen.com/events/vanille/udem/detail/845418-focusing-light
 -in-space-and-time-ivar-martin-argonne-national-labs
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Focusing light in space and time - Ivar Martin (Argonne National La
 bs)
DESCRIPTION:Redirecting and focusing light in space is the most basic techn
 ology behind eyeglasses and telescopes. The optical elements -- lenses or 
 mirrors -- are usually static on the time scale of waves and thus do not c
 hange their color (frequency).
\nWhat would happen if the optical elements
  are allowed to evolve in time\, fast? Now the frequency can change (Doppl
 er effect)\, but more interestingly\, it becomes possible to invent protoc
 ols that focus waves not only in space but also in time\, with the energy 
 concentrated in short pulses.
\nThis effects can be illustrated by a “ph
 oton accelerator” – a (so far) mythical machine that can take a classi
 cal cavity light and amplify exponentially its intensity and energy. In th
 e quantum realm\, similar manipulation can focus zero-point quantum vacuum
  fluctuations into pulses\, while depleting them elsewhere.  This exotic 
 light focusing can be interpreted in terms of emergent space metric that c
 ontains event horizons.
\nLa conférence est pour tout public et le café 
 est servi dès 11h30.
\nhttps://www.anl.gov/profile/ivar-martin
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