Please use this identifier to cite or link to this item:
|Title:||Positional stability of holographic optical traps|
Blab, Gerhard A.
Montes Usategui, Mario
Forde, Nancy R.
Martín Badosa, Estela
|Publisher:||Optical Society of America|
|Abstract:||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).|
|Note:||Reproducció del document publicat a: http://dx.doi.org/10.1364/OE.19.021370|
|It is part of:||Optics Express, 2011, vol. 19, num. 22, p. 21370-21384|
|Appears in Collections:||Articles publicats en revistes (Física Aplicada)|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.