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16 February 2011 Optical sculpting: trapping through disorder and transfer of orbital angular momentum
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Proceedings Volume 7950, Complex Light and Optical Forces V; 79500R (2011)
Event: SPIE OPTO, 2011, San Francisco, California, United States
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.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Cižmár, M. Mazilu, H. Dalgarno, P. Ashok, F. Gunn-Moore, and K. Dholakia "Optical sculpting: trapping through disorder and transfer of orbital angular momentum", Proc. SPIE 7950, Complex Light and Optical Forces V, 79500R (16 February 2011); doi: 10.1117/12.876357;


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