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Related Experiment Video

Updated: Sep 19, 2025

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

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Topological Magnetic Lattices for On-Chip Nanoparticle Trapping and Sorting.

Hongyang Xu1, Xi Xie1,2, Chuangye Zhang1

  • 1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Institute of Micro and Nano Optoelectronics & State Key Laboratory of Radio Frequency Heterogeneous Integration, Shenzhen University, Shenzhen 518060, China.

Nano Letters
|June 16, 2025
PubMed
Summary

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This study introduces a novel magnetic topological lattice using Bloch surface waves (BSWs) on dielectric multilayers. This approach overcomes limitations of surface plasmon polariton (SPP) systems, enabling efficient nanoparticle manipulation and sorting with reduced heat.

Area of Science:

  • Photonics and Nanophotonics
  • Topological Physics
  • Materials Science

Background:

  • On-chip optical lattices using surface plasmon polaritons (SPPs) offer nanoparticle manipulation capabilities.
  • SPP systems are hindered by significant ohmic loss and heat generation due to metallic excitation.
  • Need for alternative on-chip optical lattice platforms with improved performance and reduced thermal effects.

Purpose of the Study:

  • To propose and investigate a novel magnetic topological lattice based on Bloch surface waves (BSWs).
  • To demonstrate the advantages of BSWs over SPPs for on-chip optical applications.
  • To explore the potential for dynamic manipulation and size-dependent sorting of nanoparticles.

Main Methods:

  • Excitation of Bloch surface waves (BSWs) on transparent dielectric multilayers.
Keywords:
Bloch surface waveoptical latticeoptical topologyoptical tweezerssorting of nanoparticles

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Last Updated: Sep 19, 2025

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  • Analysis of magnetic field and spin vector topologies within the BSW lattice.
  • Demonstration of nanoparticle manipulation and sorting through lattice reconfiguration via polarization and phase adjustments.

    • Main Results:

    • BSW-based magnetic topological lattices exhibit ultralong propagation ranges and reduced thermal effects compared to SPPs.
    • Rich topological phenomena are observed in the magnetic field and spin vector.
    • Feasible large-scale dynamic manipulation and size-dependent sorting of nanoparticles are achieved.

    Conclusions:

    • BSW-based magnetic topological lattices offer a promising alternative to SPP systems for on-chip applications.
    • The proposed platform provides enhanced control over optical topologies and nanoparticle manipulation.
    • Results offer new insights into magnetic field-governed optical topologies with potential applications in other wave systems.