Optical Conveyor Belt With Electrically Tunable Graphene Plasmonic Nanorings

Article Materials Science, Multidisciplinary

Dynamically Reconfigurable Bipolar Optical Gradient Force Induced by Mid-Infrared Graphene Plasmonic Tweezers for Sorting Dispersive Nanoscale Objects

Puspita Paul et al.

Summary: This study demonstrates a new technique for optical trapping and manipulation using mid-infrared excitation, which offers additional functionalities and advantages compared to existing techniques in the visible and near-infrared regions. With high-performance and versatile mid-infrared plasmonic tweezers, nanoscale objects of different materials can be selectively trapped or repelled in a dynamically reconfigurable way.

ADVANCED OPTICAL MATERIALS (2022)

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Article Optics

Optically levitated conveyor belt based on polarization-dependent metasurface lens arrays

Feng Xu et al.

Summary: In this study, an optically levitated conveyor belt based on a nanoslit-based metasurface lens is proposed for capturing, transporting, and sorting particles. By rotating the polarization angle of the excitation beam, the stiffness and success ratio of particle transport can be improved. The influence of polarization switching time and incident optical power densities on transport efficiency are also investigated.

OPTICS LETTERS (2022)

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Article Optics

Plasmonic optical trapping of nanoparticles using T-shaped copper nanoantennas

Rengang Li et al.

Summary: This study demonstrates the optical trapping of single dielectric nanoparticles in a microfluidic chamber using a coupled T-shaped copper plasmonic nanoantenna for studying light-matter interaction. The nanoantenna, made of copper instead of the usual gold, shows promising advantages in terms of optical properties, cost-effectiveness, and increased trapping area. Simulation results and analysis suggest that copper nanoantennas have great potential in optical nanotweezers for trapping nanoparticles and advancing nanophotonic devices.

OPTICS EXPRESS (2021)

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Article Optics

Optical conveyor belt based on a plasmonic metasurface with polarization dependent hot spot arrays

Chi Zhang et al.

Summary: This Letter proposes a novel metasurface conveyor belt using arrays of gold plasmonic elliptical elements for trapping, transporting, and sorting particles. By switching the polarization of the excitation beam, the elements can be continuously lit, providing a larger trapping area. The design offers a new scheme for particle sorting in optofluidic applications.

OPTICS LETTERS (2021)

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Article Nanoscience & Nanotechnology