Düsseldorf 2007 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 53: New Experimental Techniques

MO 53.6: Vortrag

Donnerstag, 22. März 2007, 15:30–15:45, 6D

Generation of Vector Modes with a twisted nematic Spatial Light Modulator — •Alexander Jesacher, Christian Maurer, Severin Fürhapter, Stefan Bernet, and Monika Ritsch-Marte — Division for Biomedical Physics, Innsbruck Medical University, Innsbruck, Austria

During the last decade, liquid crystal technology has found several applications in applied optics. Highly miniaturized displays with pixel sizes in the range of micrometers can be used to produce nearly arbitrary phase diffractive structures. Consequently, these devices which are also called ``spatial light modulators'' or ``SLMs'' are ideal tools for mode shaping tasks.

In some areas of research, it is desirable not only to control the phase of a light field but also its polarization state. Especially in the regime of highly focussed laser beams, where the scalar wave equation is not applicable, differences in polarization lead to significantly different intensity distributions. We demonstrate how the generation of radially and azimuthally polarized Laguerre-Gaussian and Hermite-Gaussian laser modes can be performed by using a twisted nematic liquid crystal display.