Optical tweezers in microassembly

Ostendorf, Andreas; Ghadiri, Reza; Ksouri, Sarah Isabelle

doi:10.1117/12.2006127

Cited by 9 publications

(3 citation statements)

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“…It is routinely used to apply forces on the order of 0.1 to 100 pN to particles spanning a few nanometers all the way up to tens of microns in diameter [1]. Translational force control with OT has been incorporated into a wide variety of applications including micro-robotics [2], micro-scaled manufacturing [3,4] and single molecule force spectroscopy [5]. Optical trapping experiments typically rely on pure dielectric micro-particles to serve as handles for interfacing with these systems, since the low absorption and relatively high index of refraction of the dielectric material are ideal for generating stable optical traps.…”

Section: Introductionmentioning

confidence: 99%

Optical trapping performance of dielectric-metallic patchy particles

2015

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We demonstrate a series of simulation experiments examining the optical trapping behavior of composite micro-particles consisting of a small metallic patch on a spherical dielectric bead. A full parameter space of patch shapes, based on current state of the art manufacturing techniques, and optical properties of the metallic film stack is examined. Stable trapping locations and optical trap stiffness of these particles are determined based on the particle design and potential particle design optimizations are discussed. A final test is performed examining the ability to incorporate these composite particles with standard optical trap metrology technologies.

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Section: Introductionmentioning

confidence: 99%

Optical trapping performance of dielectric-metallic patchy particles

2015

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“…The generated force can be the optical force from the beam itself or an induced force at an interface. The main variants of LDA include techniques such as opto-electronic tweezers (OET) [82][83][84][85], opto-thermophoretic tweezers (OTT) [86][87][88][89][90][91][92], bubble pen lithography (BPL) [93][94][95][96], and optical tweezers (OT) [97][98][99][100][101][102][103][104][105][106][107][108][109][110][111]. The first three listed techniques-OET, OTT, and BPL-rely on the presence of a substrate to generate the required force.…”

Section: Light Directed Assemblymentioning

confidence: 99%

“…OT are a versatile manipulation technique, as they can be used to trap and assemble a variety of objects with different shapes, sizes, and material compositions, including dielectric microspheres [99,101,102,106,125,127,128], metallic nanoparticles [126,129] nanowires, [110,[130][131][132][133][134][135], and biological media [104,124,[136][137][138][139]. While OT can effectively position a diverse array of objects in 3D, it is necessary to immobilize these objects in the absence of the optical trap to form self-standing structures.…”

Section: Light Directed Assemblymentioning

confidence: 99%

3D Nanophotonic device fabrication using discrete components

Melzer

McLeod

2020

Nanophotonics

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AbstractThree-dimensional structure fabrication using discrete building blocks provides a versatile pathway for the creation of complex nanophotonic devices. The processing of individual components can generally support high-resolution, multiple-material, and variegated structures that are not achievable in a single step using top-down or hybrid methods. In addition, these methods are additive in nature, using minimal reagent quantities and producing little to no material waste. In this article, we review the most promising technologies that build structures using the placement of discrete components, focusing on laser-induced transfer, light-directed assembly, and inkjet printing. We discuss the underlying principles and most recent advances for each technique, as well as existing and future applications. These methods serve as adaptable platforms for the next generation of functional three-dimensional nanophotonic structures.

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Modular Assembly of Metamaterials Using Light Gradients

Paul,

Volk,

Hokmabadi

et al. 2024

Advanced Materials

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This is a report on a pilot study that tests the feasibility of assembling photonic metamaterials (PMs) using light gradient forces. Following a strategy that works like modular construction, light gradient forces, produced by a tightly focused, one‐dimensional standing wave optical trap (SWOT), time‐multiplexed across a two‐dimensional lattice were used to assemble voxels consisting of prefabricated, monodispersed nanoparticles (NPs) with radii ranging from 30 to 500 nm into three‐dimensional structures on a hydrogel scaffold. Hundreds of NPs can be manipulated concurrently into a complex heterogeneous voxel this way, and then the process can be repeated by stitching together voxels to form a metamaterial of any size, shape, and constituency although imperfectly. Imperfections introduce random phase‐shifts and amplitude variations that can have an adverse effect on the band structure. Regardless, PMs were created this way using two different dielectric NPs, polystyrene and rutile, and then the near‐infrared performance for each was analyzed with angle‐, wavelength‐, and polarization‐dependent reflection spectroscopy. The cross‐polarized spectra showed evidence of a resonance peak. Interestingly, whereas the line‐shape from the polypropylene array was symmetric, the rutile array was not, which may be indicative of Fano resonance. So, even with the structural defects, reflection spectroscopy revealed a resonance.This article is protected by copyright. All rights reserved

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Optical tweezers in microassembly

Cited by 9 publications

References 0 publications

Optical trapping performance of dielectric-metallic patchy particles

Optical trapping performance of dielectric-metallic patchy particles

3D Nanophotonic device fabrication using discrete components

Modular Assembly of Metamaterials Using Light Gradients

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