Optical sculpting: trapping through disorder and transfer of orbital angular momentum

T. Cizmar, M. Mazilu, H. Dalgarno, P. Ashok, Frank Gunn-Moore, K. Dholakia

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this paper, we explore the propagation of light through disordered material and ask whether we can create an optimal focus in such a scenario. We use the complex modulation of the input light (i.e. modulation in both phase and amplitude) for these studies, implemented by use a spatial light modulator (SLM) and show trapping and manipulation through a static turbid medium. We then extend the system to create a tandem SLM system with an acousto-optic deflector. This has further advantages as we can now not only project light fields into turbid media but can also create interference-free mode superpositions of light fields such as Laguerre-Gaussian (LG) and Bessel modes. This is illustrated by controlled rotation of trapped particles in weighted, interference-free superpositions of LG beams of opposite order but equal magnitude.

Original languageEnglish
Title of host publicationComplex Light and Optical Forces V
EditorsD. L. Andrews, E. J. Galvez, J. Gluckstad
Number of pages7
ISBN (Print)978-0-81948-487-1
Publication statusPublished - 3 Feb 2011
EventConference on Complex Light and Optical Forces V - San Francisco, CA, United States
Duration: 26 Jan 201127 Jan 2011

Publication series

NameProceedings of SPIE
ISSN (Print)0277-786X


ConferenceConference on Complex Light and Optical Forces V
Country/TerritoryUnited States
CitySan Francisco, CA


  • Coherence
  • Interference
  • Diffraction
  • optical vortex
  • trapping
  • optical tweezers


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