Three-dimensional dynamic optical manipulation by combining a diffractive optical element and a spatial light modulator |
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Authors: | Mingjie Zheng Yusuke Ogura Jun Tanida |
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Institution: | (1) Department of Information and Physical Sciences, Graduate School of Information Science and Technology, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan |
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Abstract: | Since the introduction of computer-controlled spatial light modulators (SLMs), holographic optical tweezers have become an
important tool for dynamic parallel optical manipulation. In this paper we clarify the usefulness of a new configuration for
optical trapping that creates light patterns using the combination of a diffractive optical element (DOE) and an SLM. This
configuration not only enables the use of the higher part of the SLM’s diffraction efficiency curve, because a simple hologram
can be chosen for the SLM, but also achieves three-dimensional dynamic optical manipulation over a large spatial range. By
switching blaze-like holograms displayed on the SLM, we demonstrated simultaneous transportation of three 6-μm-diameter polystyrene
beads over a range of 90 μm in the vertical direction and 37.5 μm in the horizontal direction. Compared with the same manipulation
executed using only the SLM, the range of this method is extended four-fold in the vertical direction and three-fold in the
horizontal direction. |
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Keywords: | spatial light modulator diffractive optical element blaze-like hologram optical manipulation holographic optical tweezers diffractive efficiency transportation |
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