Optical transport, lifting and trapping of micro-particles by planar waveguides

Helle, Øystein Ivar; Ahluwalia, Balpreet Singh; Hellesø, Olav Gaute

doi:10.1364/oe.23.006601

Cited by 23 publications

(28 citation statements)

References 21 publications

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“…A 10 µm gap between strip waveguides was previously shown to optically lift and stably trap 1-3 µm diameter particles [11]. However, for gaps with larger separation, the optical forces from the end of a strip waveguide decrease rapidly with distance in accordance with the rapid divergence of the field (Fig.…”

Section: Discussionmentioning

confidence: 86%

“…At the end facet of a strip waveguide, the field ceases to be guided and the output beam diverges fast. Using the field in the gap between end facets from two opposing waveguides, particles can be stably trapped and also lifted up in three-dimensions away from the surface [11][12]. However, it is shown in this paper that when the gap between the end facets of strip waveguides increases (>20 μm), the trapping capabilities are reduced significantly.…”

Section: Introductionmentioning

confidence: 82%

“…2(e). A similar structure has previously been used to trap particles in a 2 µm wide gap [12] and to lift particles [11], both using strip waveguides. …”

Section: Waveguide Design and Fabricationmentioning

confidence: 99%

“…It has been shown that this evanescent field can successfully trap and propel a range of particle types (polystyrene spheres, nanowires, cells, virus) and sizes [3][4][5][6][7][8][9][10][11][12][13][14]. Different waveguide geometries have been employed, such as diffused [3], strip [4][5][6][10][11][12][13][14], slot [7], ARROW [8] and plasmonic [9] waveguides. Narrow rib waveguides have significantly lower propagation losses than strip waveguides due to the lower side-walls [15].…”

Section: Introductionmentioning

confidence: 99%

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Rib waveguides for trapping and transport of particles

2016

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Rib waveguides are investigated as an alternative to strip waveguides for planar trapping and transport of microparticles. Microparticles are successfully propelled along the surface of rib waveguides and trapped in the gap between opposing rib waveguides. The trapping capabilities of waveguide end facets formed by a single and opposing waveguide geometries are investigated. The slab beneath a rib waveguide continues to guide light after the end facet of a rib waveguide. Thus particles can be trapped in wider gaps formed by opposing rib waveguides than with strip waveguides. Rib waveguides were found more efficient in trapping a collection of particles in the gap and particles could be moved to different locations in the gap by changing the relative power in the two opposing rib waveguides. Numerical simulations are used to show that the trapping efficiency on the surface of rib and strip waveguides is comparable. The simulations also confirm the advantage of opposing rib waveguides for trapping particles in wide gaps. The low sidewalls of rib waveguides give low propagation losses and make it easy to integrate rib waveguides with other functions in a lab-on-a-chip where particle trapping and transport is required.

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Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 82%

“…2(e). A similar structure has previously been used to trap particles in a 2 µm wide gap [12] and to lift particles [11], both using strip waveguides. …”

Section: Waveguide Design and Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rib waveguides for trapping and transport of particles

2016

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“…Waveguide structures are today commonly employed in e.g. sensing applications 17 , Raman spectroscopy 18 and optical trapping 19,20 . Integrated photonic circuit enables easy beam shaping, and is well suited for integration with e.g.…”

Section: Introductionmentioning

confidence: 99%

Chip-based nanoscopy: towards integration and high-throughput imaging

Coucheron

Helle

Øie

et al. 2017

Nanoimaging and Nanospectroscopy V

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Super-resolution optical microscopy, commonly referred to as optical nanoscopy, has enabled imaging of biological samples with a resolution that was only achievable previously using electron microscopy. Optical nanoscopy is a rapidly growing field, with several different techniques and implementations that overcome the diffraction limit of light. However, the common nanoscope continues to be a rather complex, expensive and bulky instrument. Direct stochastic optical reconstruction microscopy (dSTORM) imaging was recently demonstrated using a waveguide platform for excitation in combination with a simple microscope for imaging. High refractive index waveguide materials have a high intensity evanescent field stretching around 100-200 nm outside the guiding material, which is ideally suited for total internal reflection fluorescence (TIRF) excitation over large areas. We demonstrate dSTORM imaging of the plasma membrane of liver sinusoidal endothelial cells (LSECs) and trophoblasts (HTR-8 cells) using waveguide excitation, with resolution down to around 70 nm. Additionally, we present TIRF imaging of LSEC micro-tubules over a 500 μm x 500 μm area, laying the foundation for large field of view (f-o-v) nanoscopy.

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Near‐Field Optical Tweezers for Chemistry and Biology

Liao

Cai

et al. 2019

Physica Status Solidi (a)

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Near‐field optical tweezer techniques have been essential for the development for manipulation and identification of micro‐ and nanoparticles (NPs) in lab‐on‐a‐chip systems. Optical waveguide, which has been exploited as a fascinating manipulation approach, provides valuable insights into the biology of the specific type of cells and potential for enhanced Raman spectroscopy. Specific waveguides and its own structures in near‐field optical techniques can be used to trap, transport, sort, levitate, and deform a micro‐ or NP in colloid chemistry and pharmaceutical biology. Given the precise manipulation and trapping stiffness with low light power, a diverse range of micro/nanostructured optical fiber, silicon‐on‐insulator resonator, photonic crystal cavity, and plasmonic waveguide have been proposed in many theoretical models and experimental observations, including polystyrene bead, silica bead, metal particle, erythrocyte, virus, and DNA. Considering the optical pressure fundamental, fabrication process, and structure categorization, this review describes recent mainstream developments and future perspectives of near‐field optical tweezers for chemical and biological applications.

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Optical transport, lifting and trapping of micro-particles by planar waveguides

Cited by 23 publications

References 21 publications

Rib waveguides for trapping and transport of particles

Rib waveguides for trapping and transport of particles

Chip-based nanoscopy: towards integration and high-throughput imaging

Near‐Field Optical Tweezers for Chemistry and Biology

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