Gearing up for optical microrobotics: micromanipulation and actuation of synthetic microstructures by optical forces

Palima, Darwin; Glückstad, Jesper

doi:10.1002/lpor.201200030

Cited by 112 publications

(60 citation statements)

References 210 publications

(330 reference statements)

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“…Homogeneous spherical beads are popular in optical micromanipulation studies both for the experimental predictability and theoretical tractability. However, together with conventional microfabrication technologies, the laser direct-write methods for three-dimensional fabrication (e.g., multiphoton polymerization [91]) open new possibilities for creating synthetic microstructures of various shapes for wide range of applications [92]. Hence, it is worth examining structure-based degrees of freedom for optimizing optical micromanipulation [93].…”

Section: Micromanipulation Of Designed Microstructuresmentioning

confidence: 99%

“…In STED microscopy [102], resolution enhancement is mediated by a second light source that shuts off fluorescence around a nanometric core where fluorescence is then localized using only far-field optics. In optical micromanipulation, a way to jump the diffraction hurdle is using structure-mediated micro-to-nano coupling [92]. Here, a trapped microstructure, big enough to be amenable to optical trapping, serves to tap onto a diffraction limited beam and channel its effects onto subwavelength regime.…”

Section: Trapped Microstructures For Light Deliverymentioning

confidence: 99%

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Engineering light-matter interaction for emerging optical manipulation applications

et al. 2014

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Abstract:In this review, we explore recent trends in optical micromanipulation by engineering light-matter interaction and controlling the mechanical effects of optical fields. One central theme is exploring the rich phenomena beyond the now established precision measurements based on trapping micro beads with tightly focused beams. Novel synthesized beams, exploiting the linear and angular momentum of light, open new possibilities in optical trapping and micromanipulation. Similarly, novel structures are promising to enable new optical micromanipulation modalities. Moreover, an overview of the amazing features of the optics of tractor beams and backward-directed energy fluxes will be presented. Recently the so-called effect of negative propagation of the beams (existence of the backward energy fluxes) has been confirmed for X-waves and Airy beams. In the review, we will also discuss the negative pulling force of structured beams and negative energy fluxes in the vicinity of fibers. The effect is achieved due to the interaction of multipoles or, in another interpretation, the momentum conservation. Both backward-directed Poynting vector and backward optical forces are counter-intuitive and give an insight into new physics and technologies. Exploiting the degrees of freedom in synthesizing novel beams and designed microstructures offer attractive prospects for emerging optical manipulation applications.

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Section: Micromanipulation Of Designed Microstructuresmentioning

confidence: 99%

Section: Trapped Microstructures For Light Deliverymentioning

confidence: 99%

Engineering light-matter interaction for emerging optical manipulation applications

et al. 2014

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“…1,2 Recently, trapped objects are no longer being restricted to simple spherical polystyrene beads, but can be extended to intricate threedimensional (3-D) objects that can be fabricated using two-photon photopolymerization (2PP). 3 The use of 2PP allows flexibility in the design of the structures so that they can be 3-D printed to perform various predefined tasks. 4 One typical example is an optically actuated surface scanning probe to investigate surface topography.…”

Section: Introductionmentioning

confidence: 99%

Generalized phase contrast-enhanced diffractive coupling to light-driven microtools

Villangca

Bañas²,

Palima

et al. 2015

Opt. Eng

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Abstract. We have previously demonstrated on-demand dynamic coupling to optically manipulated microtools coined as wave-guided optical waveguides using diffractive techniques on a "point and shoot" approach. These microtools are extended microstructures fabricated using two-photon photopolymerization and function as freefloating optically trapped waveguides. Dynamic coupling of focused light via these structures being moved in three-dimensional space is done holographically. However, calculating the necessary holograms is not straightforward when using counter-propagating trapping geometry. The generation of the coupling spots is done in real time following the position of each microtool with the aid of an object tracking routine. This approach allows continuous coupling of light through the microtools which can be useful in a variety of biophotonics applications. To complement the targeted-light delivery capability of the microtools, the applied spatial light modulator has been illuminated with a properly matched input beam cross section based on the generalized phase contrast method. Our results show a significant gain in the output at the tip of each microtool as measured from the fluorescence signal of the trapping medium. The ability to switch from on-demand to continuous addressing with efficient illumination leverages our microtools for potential applications in stimulation and near-fieldbased biophotonics on cellular scales. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Trapped objects are no longer restricted to a simple polystyrene bead but now extend to advanced and structured objects that can be readily fabricated using twophoton fabrication (2PP) 3 . Using 2PP fabrication allows full 3D flexibility in the design of desired structures so that a variety of forms and tasks can be carried out.…”

Section: Introductionmentioning

confidence: 99%

Holographic 3D tracking of microscopic tools

et al. 2015

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We originally proposed and experimentally demonstrated the targeted-light delivery capability of so-called Wave-guided Optical Waveguides (WOWs) three years ago. As these WOWs are maneuvered in 3D space, it is important to maintain efficient light coupling through their integrated waveguide structures. In this work we demonstrate the use of real-time diffractive techniques to create focal spots that can dynamically track and couple to the WOWs during operation in a volume. This is done by using a phase-only spatial light modulator to encode the needed diffractive phase patterns to generate a plurality of dynamic coupling spots. In addition, we include our proprietary GPC Light Shaper before the diffractive setup to efficiently illuminate the rectangular shaped spatial light modulator by a Gaussian laser beam. The method is initially tested for a single WOW and we have experimentally demonstrated dynamic tracking and coupling for both lateral and axial displacements of the WOWs. The ability to switch from on-demand to continuous addressing with efficient illumination leverages our WOWs for potential applications in near-field stimulation and nonlinear optics at small scales.

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Gearing up for optical microrobotics: micromanipulation and actuation of synthetic microstructures by optical forces

Cited by 112 publications

References 210 publications

Engineering light-matter interaction for emerging optical manipulation applications

Engineering light-matter interaction for emerging optical manipulation applications

Generalized phase contrast-enhanced diffractive coupling to light-driven microtools

Holographic 3D tracking of microscopic tools

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