Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/52858
Title: Positional stability of holographic optical traps
Author: Farré, Arnau
Shayegan, Marjan
López-Quesada, Carol
Blab, Gerhard A.
Montes Usategui, Mario
Forde, Nancy R.
Martín Badosa, Estela
Keywords: Holografia
Instruments òptics
Làsers
Fotònica
Holography
Optical instruments
Lasers
Photonics
Issue Date: 2011
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
Related resource: http://dx.doi.org/10.1364/OE.19.021370
URI: http://hdl.handle.net/2445/52858
ISSN: 1094-4087
Appears in Collections:Articles publicats en revistes (Física Aplicada)

Files in This Item:
File Description SizeFormat 
599704.pdf1.62 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.