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SUMMARY:Information and Light in Complex Media
DTSTART:20201102T121500
DTEND:20201102T130000
DTSTAMP:20260412T091836Z
UID:0576fb53e527189c7b8fb14d204ebd4213dc488db6504baedd29ec5f
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Dr. Allard Mosk\,\nUtrecht University\nInstitute of Micr
 oengineering - Distinguished Lecture\n\nDue to the covid-19 related restri
 ctions currently in place\, the lecture will be held remotely by zoom only
 .\n\nZoom Live Stream: https://epfl.zoom.us/j/119888136\n\nAbstract: Rando
 m scattering of light\, which takes place in paper\, paint and biological 
 tissue is an obstacle to imaging and focusing of light and thus hampers ap
 plications ranging from laser ablation to precision measurements. At the s
 ame time scattering is a phenomenon of basic physical interest as it allow
 s the study of fascinating interference effects such as open transport cha
 nnels [1\,2]\, which enable lossless transport of waves through strongly s
 cattering materials. The frequency bandwidth of these channels [3] is crit
 ical to their usefulness as it determines their ability to carry pulses an
 d their information-carrying capacity. After a broad overview of the field
 \, we present new measurements of the frequency bandwidth and intensity fl
 uctuations in these channels. Moreover\, we show that  optimizing the inc
 ident light wave is essential to  extract precise information about the p
 osition of any scatterer. The information we retrieve turns out to be limi
 ted by our knowledge of the position of the other scatterers and the local
  density of states [5].\n\nBio: Allard Mosk (1970) started his physics car
 eer in ultracold atomic gases with work in Amsterdam (Ph.D. 1994)\, Heidel
 berg\, and Paris\, performing the first observation of a Feshbach resonanc
 e in Li\, and of photoassociation of H. In 2003 he joined the Complex Phot
 onic Systems group at the University of Twente. where he pioneered wavefro
 nt shaping methods to focus and image through strongly scattering media. S
 ince 2015 he holds a chair at Utrecht University\, The Netherlands\, where
  he studies statistical properties of light in complex scattering media wi
 th a view on imaging and optical precision measurements.\n\nReferences:\n\
 n	A. P. Mosk\, A. Lagendijk\, G. Lerosey\, and M. Fink\, Controlling waves
  in space and time for imaging and focusing in complex media\, Nat. Photon
 .\, 6\, 283 (2012).\n	I.M. Vellekoop and A.P. Mosk\, Universal optimal tra
 nsmission of light through disordered materials\, Phys. Rev. Lett. 101\, 1
 20601 (2008).\n	Jeroen Bosch\, Sebastianus A. Goorden\, and Allard P. Mosk
 \, Frequency width of open channels in multiple scattering media\, Opt. Ex
 pr. 24\, 26472-26478 (2016)\n	X. Xu\, X. Xie\, A. Thendiyammal\, H. Zhuang
 \, J. Xie\, Y. Liu\, J. Zhou\, and A. P. Mosk\, Imaging of objects through
  a thin scattering layer using a spectrally and spatially separated refere
 nce\, Opt. Express 26 (12)\, 15073–15083 (2018).\n	D. F. Bouchet\, R. Ca
 rminati\, and A. P. Mosk\, Influence of the local density of states on the
  localization precision of single particles in scattering environments\, a
 rXiv. org 1909.02501 (2019).\n
LOCATION:Online Only https://epfl.zoom.us/j/119888136
STATUS:CONFIRMED
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