Optical mirror trap with a large field of view

Pitzek, Maximilian; Steiger, Ruth; Thalhammer, Gregor; Bernet, Stefan; Ritsch‐Marte, Monika

doi:10.1364/oe.17.019414

Cited by 53 publications

(75 citation statements)

References 14 publications

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“…The ultrasonic field is set up in a square capillary which is held between a glass slide and an optical mirror backed with a PZT transducer, as shown schematically in Figure 9. The mirror allows a laser source, placed below this setup, to act like a dual beam trap 54 , and allows optical manipulation from a large working distance. In this trap, radial optical trapping is due to the lateral gradient force, while axially it is the balancing of the scattering forces.…”

Section: Optical Forcesmentioning

confidence: 99%

Acoustofluidics 23: acoustic manipulation combined with other force fields

Glynne‐Jones

Hill

2013

Lab Chip

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In this, the final paper of the Acoustofluidics series of tutorial articles, we discuss applications in which acoustic radiation forces are used in conjunction with competing or complementary forcefields. This may be in order to enable manipulation operations that would not be easily performed by either force-field alone, or may be used to effect separation based on the different physical principals underlying competing fields. Examples are given of a number of different applications in which acoustic forces are combined with gravitational fields, hydrodynamic forces, electric fields (including dielectrophoresis), magnetic forces and optical forces.

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Section: Optical Forcesmentioning

confidence: 99%

Acoustofluidics 23: acoustic manipulation combined with other force fields

Glynne‐Jones

Hill

2013

Lab Chip

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“…Counterpropagating diverging beams can also be used to trap objects by using opposing objective lenses 39,40 or using a dichroic sample slide or mirror behind the sample. 41,42 The scattering forces from a pair of beams cancel when the object is centered axially, removing the requirement for high NA. This enables the use of long working distance objectives at low magnifications.…”

Section: Trapping Capabilitiesmentioning

confidence: 99%

A compact holographic optical tweezers instrument

Gibson

Bowman

Linnenberger

et al. 2012

Review of Scientific Instruments

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Visual and dynamical measurement of Rayleigh-Benard convection by using fiber-based digital holographic interferometry J. Appl. Phys. 112, 113113 (2012) Guide-star-based computational adaptive optics for broadband interferometric tomography Appl. Phys. Lett. 101, 221117 (2012) Limits of elemental contrast by low energy electron point source holography J. Appl. Phys. 110, 094305 (2011) Cantilever biosensor reader using a common-path, holographic optical interferometer Appl. Phys. Lett. 97, 221110 (2010) Extended depth of focus in a particle field measurement using a single-shot digital hologram Appl. Phys. Lett. 95, 201103 (2009) Additional information on Rev. Sci. Instrum. Holographic optical tweezers have found many applications including the construction of complex micron-scale 3D structures and the control of tools and probes for position, force, and viscosity measurement. We have developed a compact, stable, holographic optical tweezers instrument which can be easily transported and is compatible with a wide range of microscopy techniques, making it a valuable tool for collaborative research. The instrument measures approximately 30×30×35 cm and is designed around a custom inverted microscope, incorporating a fibre laser operating at 1070 nm. We designed the control software to be easily accessible for the non-specialist, and have further improved its ease of use with a multi-touch iPad interface. A high-speed camera allows multiple trapped objects to be tracked simultaneously. We demonstrate that the compact instrument is stable to 0.5 nm for a 10 s measurement time by plotting the Allan variance of the measured position of a trapped 2 μm silica bead. We also present a range of objects that have been successfully manipulated.

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“…The need for a high numerical aperture for stable axial trapping has confined HOT to situations where samples could be accessed using short working distance objectives. Using a mirror trap configuration [9,10] and a diamond anvil cell (DAC) [11] we have recently shown that the full power of holographic tweezers can be also made available for high pressure studies [12,13]. Optical tweezers have been successfully applied to the study of the mechanical and rheological response of soft and biological matter [14].…”

Section: Introductionmentioning

confidence: 99%

Holographic tracking and sizing of optically trapped microprobes in diamond anvil cells

et al. 2016

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We demonstrate that Digital Holographic Microscopy can be used for accurate 3D tracking and sizing of a colloidal probe trapped in a diamond anvil cell (DAC). Polystyrene beads were optically trapped in water up to Gigapascal pressures while simultaneously recording in-line holograms at 1 KHz frame rate. Using Lorenz-Mie scattering theory to fit interference patterns, we detected a 10% shrinking in the bead's radius due to the high applied pressure. Accurate bead sizing is crucial for obtaining reliable viscosity measurements and provides a convenient optical tool for the determination of the bulk modulus of probe material. Our technique may provide a new method for pressure measurements inside a DAC.

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Optical mirror trap with a large field of view

Cited by 53 publications

References 14 publications

Acoustofluidics 23: acoustic manipulation combined with other force fields

Acoustofluidics 23: acoustic manipulation combined with other force fields

A compact holographic optical tweezers instrument

Holographic tracking and sizing of optically trapped microprobes in diamond anvil cells

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