Hannover 2016 – wissenschaftliches Programm

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SYBO: Symposium Biomedical Optics

SYBO 2: Symposium Biomedical Optics 2

SYBO 2.3: Hauptvortrag

Donnerstag, 3. März 2016, 15:30–16:00, e415

Scuplted light landscapes for optical micro-manipulation — Christina Alpmann, Alvaro Barroso Pena, Eileen Otte, Kathrin Dieckmann, and •Cornelia Denz — Institute of Applied Physics, University of Muenster

The modulation of the spatial polarization, amplitude and phase distribution of light covers a broad range of applications, e.g. in laser machining, high-NA microscopy or optical micro-manipulation where these properties are used to shape the focal field in three dimensions.

In the last years, the holographic modulation of amplitude and phase have been widely employed in optical trapping techniques to create three-dimensional optical potential landscapes that allow manipulating several microscopic particles. In particular, we have shown that such tailored light fields are ideally suited for the organization and structuring of soft and biomatter entities, as e.g. zeolite L nanocontainers or bacterial molecular motors. Beside the modulation of amplitude and phase, polarization modulation enriches light shaping. While phase gradients can be used in order to exert orbital angular momentum, polarization structured light fields offer the possibility of spatially varying spin angular momentum affecting the trapped micro-particle.

In this contribution, we present our recent results in holographic generation of sophisticated tailored light fields which, in comparison to established holographic optical tweezers, provide remarkable higher trapping and control of complex particle orientation, and discuss the principles and applications of phase, amplitude and polarization modulated light for optical micro-manipulation.