Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices

Yang, Tsang-Po; Yossifon, Gilad; Yang, Yi

doi:10.1063/1.4948775

Cited by 5 publications

(3 citation statements)

References 43 publications

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“…Moreover, the plasmonic optical lattice is created from arrays of periodic plasmonic nanostructures to confer long range transport of micro-and nanoparticles and multiple particle stacking 11,12 . One major obstacle to disrupt trapping in an optical lattice is photothermal convection and efforts have been made to elucidate its effects by several groups 14,15,16,17 . Using Green's function, Baffou et al have calculated a temperature profile by modeling each plasmonic nanostructure as a point heater and then experimentally validated their model 14 .…”

Section: Introductionmentioning

confidence: 99%

“…The author's group has also characterized both near-field and convectional transport and demonstrated an engineering strategy to suppress photothermal convection 16,17 .…”

mentioning

confidence: 99%

“…Single Particle Trajectories. The trajectories of the microparticles extracted using image processing are compiled using the centroid algorithm16 and displayed here. The optical power used for plasmonic resonance excitation at 980 nm is 5 mW.…”

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confidence: 99%

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Bhalothia¹,

Yang²

2017

JoVE

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The plasmonic optical tweezer has been developed to overcome the diffraction limits of the conventional far field optical tweezer. Plasmonic optical lattice consists of an array of nanostructures, which exhibit a variety of trapping and transport behaviors. We report the experimental procedures to trap micro-particles in a simple square nanoplasmonic optical lattice. We also describe the optical setup and the nanofabrication of a nanoplasmonic array. The optical potential is created by illuminating an array of gold nanodiscs with a Gaussian beam of 980 nm wavelength, and exciting plasmon resonance. The motion of particles is monitored by fluorescence imaging. A scheme to suppress photothermal convection is also described to increase usable optical power for optimal trapping. Suppression of convection is achieved by cooling the sample to a low temperature, and utilizing the near-zero thermal expansion coefficient of a water medium. Both single particle transport and multiple particle trapping are reported here.

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Section: Introductionmentioning

confidence: 99%

“…The author's group has also characterized both near-field and convectional transport and demonstrated an engineering strategy to suppress photothermal convection 16,17 .…”

mentioning

confidence: 99%

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Bhalothia¹,

Yang²

2017

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Plasmonic Optical Tweezers for Particle Manipulation: Principles, Methods, and Applications

Ren

Chen

et al. 2021

ACS Nano

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Inspired by the idea of combining conventional optical tweezers with plasmonic nanostructures, a technique named plasmonic optical tweezers (POT) has been widely explored from fundamental principles to applications. With the ability to break the diffraction barrier and enhance the localized electromagnetic field, POT techniques are especially effective for high spatial-resolution manipulation of nanoscale or even subnanoscale objects, from small bioparticles to atoms. In addition, POT can be easily integrated with other techniques such as lab-on-chip devices, which results in a very promising alternative technique for high-throughput single-bioparticle sensing or imaging. Despite its label-free, high-precision, and high-spatial-resolution nature, it also suffers from some limitations. One of the main obstacles is that the plasmonic nanostructures are located over the surfaces of a substrate, which makes the manipulation of bioparticles turn from a three-dimensional problem to a nearly two-dimensional problem. Meanwhile, the operation zone is limited to a predefined area. Therefore, the target objects must be delivered to the operation zone near the plasmonic structures. This review summarizes the state-of-the-art target delivery methods for the POT-based particle manipulating technique, along with its applications in single-bioparticle analysis/imaging, high-throughput bioparticle purifying, and single-atom manipulation. Future developmental perspectives of POT techniques are also discussed.

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Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices

2016

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Here, we report the characterization of the transport of micro-and nanospheres in a simple two-dimensional square nanoscale plasmonic optical lattice. The optical potential was created by exciting plasmon resonance by way of illuminating an array of gold nanodiscs with a loosely focused Gaussian beam. This optical potential produced both in-lattice particle transport behavior, which was due to near-field optical gradient forces, and high-velocity ($lm/s) out-of-lattice particle transport. As a comparison, the natural convection velocity field from a delocalized temperature profile produced by the photothermal heating of the nanoplasmonic array was computed in numerical simulations. This work elucidates the role of photothermal effects on micro-and nanoparticle transport in plasmonic optical lattices. Published by AIP Publishing. [http://dx

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Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices

Cited by 5 publications

References 43 publications

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Plasmonic Optical Tweezers for Particle Manipulation: Principles, Methods, and Applications

Characterization of the near-field and convectional transport behavior of micro and nanoparticles in nanoscale plasmonic optical lattices

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