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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/52858
Positional stability of holographic optical traps
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The potential of digital holography for complex manipulation of micron-sized particles with optical tweezers has been clearly demonstrated. By contrast, its use in quantitative experiments has been rather limited, partly due to fluctuations introduced by the spatial light modulator (SLM) that displays the kinoforms. This is an important issue when high temporal or spatial stability is a concern. We have investigated the performance of both an analog-addressed and a digitally-addressed SLM, measuring the phase fluctuations of the modulated beam and evaluating the resulting positional stability of a holographic trap. We show that, despite imparting a more unstable modulation to the wavefront, our digitally-addressed SLM generates optical traps in the sample plane stable enough for most applications. We further show that traps produced by the analog-addressed SLM exhibit a superior pointing stability, better than 1 nm, which is comparable to that of non-holographic tweezers. These results suggest a means to implement precision force measurement experiments with holographic optical tweezers (HOTs).
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FARRÉ FLAQUER, Arnau, et al. Positional stability of holographic optical traps. Optics Express. 2011. Vol. 19, num. 22, pags. 21370-21384. ISSN 1094-4087. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/52858