Speckle optical tweezers: micromanipulation with random light fields (original) (raw)
ADS
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Abstract
Current optical manipulation techniques rely on carefully engineered setups and samples. Although similar conditions are routinely met in research laboratories, it is still a challenge to manipulate microparticles when the environment is not well controlled and known a priori, since optical imperfections and scattering limit the applicability of this technique to real-life situations, such as in biomedical or microfluidic applications. Nonetheless, scattering of coherent light by disordered structures gives rise to speckles, random diffraction patterns with well-defined statistical properties. Here, we experimentally demonstrate how speckle fields can become a versatile tool to efficiently perform fundamental optical manipulation tasks such as trapping, guiding and sorting. We anticipate that the simplicity of these "speckle optical tweezers" will greatly broaden the perspectives of optical manipulation for real-life applications.
Publication:
Optics Express
Pub Date:
July 2014
DOI:
arXiv:
Bibcode:
Keywords:
- Physics - Optics;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Statistical Mechanics
E-Print:
Opt. Express 22, 18159-18167 (2014)