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

T. Cižmár; M. Mazilu; H. Dalgarno; P. Ashok; F. Gunn-Moore; K. Dholakia

doi:10.1117/12.876357

16 February 2011 Optical sculpting: trapping through disorder and transfer of orbital angular momentum

T. Cižmár, M. Mazilu, H. Dalgarno, P. Ashok, F. Gunn-Moore, K. Dholakia

Proceedings Volume 7950, Complex Light and Optical Forces V; 79500R (2011) https://doi.org/10.1117/12.876357
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.876357

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