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SUMMARY:Guiding Light Through Scattering Media for Imaging and Cryptograph
 y
DTSTART:20150911T130000
DTSTAMP:20260408T034942Z
UID:d9d9320952c8220a0c660f0693c6bc04d7a9c09f3143597e3579b73e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Pepijn W. H. Pinkse\, University of Twente\, Enschede (N
 L)\nBIOENGINEERING SEMINARAbstract:\nDisorder in optical media leads to ra
 ndom light scattering and diffusion of light. It has long been considered 
 a nuisance that needs to be avoided. In the Complex Photonic Systems group
  in Twente\, pioneering work has been done to invert the diffusion of ligh
 t in scattering media [1]. This complex wavefront shaping method uses spat
 ial light modulators to create a focus or an image through a scattering me
 dium. This and related methods are now exploited for imaging through scatt
 ering layers [2] and to understand fundamentals of light scattering in mul
 timode fibers [3] and other systems.\nIn quantum optics\, light scattering
  seems even more undesirable\, since quantum states are particularly vulne
 rable to all kinds of imperfections. However\, I will show that complex wa
 vefront shaping can counteract disorder even to the level required for qua
 ntum light. By exploiting disorder\, photonic quantum networks can be buil
 t. Moreover\, these disordered systems have intriguing and unexpected appl
 ications: they can be used as “physical unclonable function”\, unclona
 ble authentication keys that can be read out via Quantum-Secure Authentica
 tion [4].\n[1] A. P. Mosk\, A. Lagendijk\, G. Lerosey\, and M. Fink\, Cont
 rolling waves in space and time for imaging and focusing in complex media 
 (Review)\, Nature Photon. 6\, 283-292 (2012)\n[2] J. Bertolotti\, E. G. va
 n Putten\, C. Blum\, A. Lagendijk\, W. L. Vos\, and A. P. Mosk\, Non-invas
 ive imaging through opaque scattering layers\, Nature 491\, 232-234 (2012)
 \n[3] L. V. Amitonova\, A. P. Mosk\, and P. W. H. Pinkse\, The rotational 
 memory effect of a multimode fiber\, Opt. Express 23\, 20569-20575 (2015)\
 n[4] S. A. Goorden\, M. Horstmann\, A. P. Mosk\, B. Škorić\, and P. W. H
 . Pinkse\, Quantum-secure authentication of a physical unclonable key\, Op
 tica 1\, 421-424 (2014)Bio:\nPepijn Pinkse did his PhD with Jook Walraven 
 at the University of Amsterdam\, the Netherlands\, in 1997 on spin-polariz
 ed atomic hydrogen. After a brief postdoc at the University of Konstanz\, 
 Germany\, het spent 10 years at the famous Max-Planck Institute of Quantum
  Optics near Munich\, Germany where he worked on Cavity QED and cooling an
 d trapping of single atoms and cold molecules. In 2009 he switched to the 
 University of Twente\, the Netherlands as an Associate Professor and progr
 am director of the newly established Strategic Research Orientation “App
 lied Nanophotonics” in the MESA+ Institute for Nanotechnology at the Uni
 versity of Twente. His present research interests are Nanophotonics and Qu
 antum optics and he leads a group combining these two interests\, since 20
 14 as adjunct professor.
LOCATION:SV1717a http://map.epfl.ch/?room=sv1717a
STATUS:CONFIRMED
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