A high-accuracy algorithm for designing arbitrary holographic atom traps

Pasienski, Matthew; DeMarco, Brian

doi:10.1364/oe.16.002176

Cited by 162 publications

(136 citation statements)

References 38 publications

(19 reference statements)

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“…These methods can, however, suffer from laser speckle (optical vortices) resulting from both digitization errors and also defects in the phase pattern from algorithmic optimization of the SLM pattern. As cold atoms are sensitive to defects in the trapping potentials at the ∼1% level, optical speckle has limited the application of phase-based Fourier plane SLMs in quantum gases [143]. Recent progress on optimizing these patterns has, however, been promising, and it is expected that successful implementation of arbitrarily configured trapped atoms using Fourier plane methods will be demonstrated soon.…”

Section: Statusmentioning

confidence: 99%

Roadmap on structured light

Rubinsztein‐Dunlop

Forbes

Berry

et al. 2016

J. Opt.

1,098

630

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Structured light refers to the generation and application of custom light fields. As the tools and technology to create and detect structured light have evolved, steadily the applications have begun to emerge. This roadmap touches on the key fields within structured light from the perspective of experts in those areas, providing insight into the current state and the challenges their respective fields face. Collectively the roadmap outlines the venerable nature of structured light research and the exciting prospects for the future that are yet to be realized.

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Section: Statusmentioning

confidence: 99%

Roadmap on structured light

Rubinsztein‐Dunlop

Forbes

Berry

et al. 2016

J. Opt.

1,098

630

View full text Add to dashboard Cite

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“…Holographic optical tweezers are usually realized by phase-only LC-SLMs, holograms for which are generated using an iterative phase retrieval algorithm, e.g. Gerchberg-Saxton algorithm (GS) [126], mixed-region amplitude freedom algorithm (MRAF) [127], offset MRAF (OMRAF) [128] and conjugate gradient minimization [129]. Gerchberg-Saxton algorithm, proposed in 1971, is shown schematically in Fig.…”

Section: Advances In Software and Algorithmsmentioning

confidence: 99%

“…A more detailed review dedicated to aforementioned algorithms is provided by Stuart et al [130]. For even more details on the algorithms for hologram generation it is advised to refer to original papers [126][127][128][129]131].…”

Section: Advances In Software and Algorithmsmentioning

confidence: 99%

Sorting and manipulation of biological cells and the prospects for using optical forces

Atajanov

Zhbanov

Yang

2018

Micro and Nano Syst Lett

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Contemporary biomedical research requires development of novel techniques for sorting and manipulation of cells within the framework of a microfluidic chip. The desired functions of a microfluidic chip are achieved by combining and integrating passive methods that utilize the channel geometry and structure, as well as active methods that include magnetic, electrical, acoustic and optical forces. Application of magnetic, electric and acoustics-based methods for sorting and manipulation have been and are under continuous scrutiny. Optics-based methods, in contrast, have not been explored to the same extent as other methods, since they attracted insufficient attention. This is due to the complicated, expensive and bulky setup required for carrying out such studies. However, advances in optical beam shaping and computer hardware, and software have opened up new opportunities for application of light to development of advanced sorting and manipulation techniques. This review outlines contemporary techniques for cell sorting and manipulation, and provides an in-depth view into the existing and prospective uses of light for cell sorting and manipulation.

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“…One can then compute phase profiles that shape the light in a refractive [27] or diffractive manner [28]. The best diffractive methods, variants of the GS holographic method, are lossy [15,29]. For simple shapes, these losses are comparable to the method described below [18], which is computationally simpler.…”

Section: Polarization-subtractive Slm Transverse Laser Shapingmentioning

confidence: 99%

“…In [7] and [12], a spatial light modulator (SLM) was used with a modified Gerchberg-Saxton (GS) iterative Fourier transform method, e.g. [13][14][15], to make arbitrary beam shapes from a cold atom gas. However, in these cases, the beam profile is modulated by the density of the gas cloud, which alters the beam shape.…”

Section: Introductionmentioning

confidence: 99%

Adaptive electron beam shaping using a photoemission gun and spatial light modulator

Maxson

Lee

Bartnik

et al. 2015

Phys. Rev. ST Accel. Beams

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The need for precisely defined beam shapes in photoelectron sources has been well established. In this paper, we use a spatial light modulator and simple shaping algorithm to create arbitrary, detailed transverse laser shapes with high fidelity. We transmit this shaped laser to the photocathode of a high voltage dc gun. Using beam currents where space charge is negligible, and using an imaging solenoid and fluorescent viewscreen, we show that the resultant beam shape preserves these detailed features with similar fidelity. Next, instead of transmitting a shaped laser profile, we use an active feedback on the unshaped electron beam image to create equally accurate and detailed shapes. We demonstrate that this electron beam feedback has the added advantage of correcting for electron optical aberrations, yielding shapes without skew. The method may serve to provide precisely defined electron beams for low current target experiments, space-charge dominated beam commissioning, as well as for online adaptive correction of photocathode quantum efficiency degradation.

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A high-accuracy algorithm for designing arbitrary holographic atom traps

Cited by 162 publications

References 38 publications

Roadmap on structured light

Roadmap on structured light

Sorting and manipulation of biological cells and the prospects for using optical forces

Adaptive electron beam shaping using a photoemission gun and spatial light modulator

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