BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:IEM Distinguished Lecturers Seminar: Coherent perfect absorption a
 nd transmission of light with arbitrary wavefronts
DTSTART:20230317T131500
DTEND:20230317T140000
DTSTAMP:20260405T164528Z
UID:c3fae57d50a698e50c798aa0a1cd60c626f8c5460ddfcd46d6d027ea
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Stefan Rotter\,\nInstitute for Theoretical Physics\, TU 
 Wien\, Vienna\, Austria\nThe seminar will take place in ELA 2 and will be 
 simultaneously broadcasted in the main auditorium in Neuchâtel Campus (M
 C A1 272).\n\nCoffee and cookies will be served at 13:00 before the semin
 ar\, in front of the two auditoriums. \n\n\nAbstract\nIn my talk I will p
 resent two recent works focused on the perfect absorption and transmission
  of waves through interferometric cancellation of backscattering. In the f
 irst case [1]\, we demonstrate that even a weakly absorbing film can be tu
 rned into a “coherent perfect absorber” by building a degenerate cavit
 y around it. This special cavity perfectly couples incoming light fields w
 ith arbitrary wavefronts into the absorber – even for the case that ligh
 t is a dynamically varying speckle pattern. In the second case [2]\, we de
 monstrate how to construct an anti-reflection structure for a complex scat
 tering system like a disordered medium. Similar to an anti-reflection coat
 ing for conventional eye-glasses\, this structure leads to perfect transmi
 ssion across the scattering system by suppressing back-scattering for any 
 incoming wavefront. Successful experimental implementations will be discus
 sed in both cases. \n\n[1] Y. Slobodkin\, G. Weinberg\, H. Hörner\, K. P
 ichler\, S. Rotter\, and O. Katz\, Science 377\, 995 (2022)\n[2] M. Horod
 ynski\, M. Kühmayer\, C. Ferise\, S. Rotter\, and M. Davy\, Nature 607\,
  281 (2022)\n\nBio\nStefan Rotter is professor at TU Wien’s Institute fo
 r Theoretical Physics. After studies in Vienna and at EPFL\, he obtained h
 is Ph.D. in 2004\, followed by a postdoctoral position at Yale University.
  His group was established in 2011 and focuses on non-Hermitian physics\, 
 theoretical quantum optics and on the propagation of classical or quantum 
 waves through complex media. In all of these fields the Rotter group aims 
 at identifying interesting new research directions and at exploring them i
 n close collaboration with the experiment.\n 
LOCATION:ELA 2 https://plan.epfl.ch/?room==ELA%202 https://epfl.zoom.us/j/
 63596420243
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR