Focusing light through a free-form scattering medium

Alfredo Rates Soriano, Aurèle J.L. Adam, Wilbert L. IJzerman, Ad Lagendijk, Willem L. Vos

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Imaging and transport light through scattering opaque media is a hot topic pursued in multiple fields, ranging from nanotechnology to life sciences. A promising technique to do this is wavefront shaping (WFS), where the light propagation through a scattering medium is controlled by interference [1][2]. Recently, the potential of WFS was even extended to, for instance, time-varying samples [3][4]. In most cases to date, WFS has been done on the quintessential scattering sample geometry, namely in slabs.
Real-world applications, however, require samples to have any shape – “free-form scattering optics” – that defies current theories. Here, we present the study of an opaque sample of TiO2 particles suspended in silicone. Exploiting the flexibility of silicone, we are able to modify the geometry of the sample and measure the enhancement of the intensity η in a point of the speckle pattern. Using this opportunity, we compare the performance of a flat and a free form sample. These experimental measurements will be compared with a newly formulated theory of light transport in free form scattering media.
Original languageEnglish
Title of host publication2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2021
ISBN (Electronic)9781665418768
Publication statusPublished - 21 Jun 2021
EventCLEO/EUROPE-EQEC 2021 - Online conference, Virtual, Online, Germany
Duration: 21 Jun 202125 Jun 2021


ConferenceCLEO/EUROPE-EQEC 2021
Abbreviated titleCLEO EUROPE 2021
CityVirtual, Online
Internet address


  • free form
  • wavefront shaping


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