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Related Experiment Video

Updated: Mar 14, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

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Biocompatible and High Stiffness Nanophotonic Trap Array for Precise and Versatile Manipulation.

Fan Ye1,2, Ryan P Badman1, James T Inman1,2

  • 1Department of Physics-LASSP, Cornell University , Ithaca, New York 14853, United States.

Nano Letters
|October 1, 2016
PubMed
Summary

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We developed advanced nanophotonic Standing Wave Array Traps (nSWATs) for on-chip single molecule and cell studies. These improved optical tweezers offer higher performance and lower cost for lab-on-a-chip applications.

Area of Science:

  • Nanophotonics
  • Biophysics
  • Microfluidics

Background:

  • On-chip nanophotonic platforms enable complex single molecule and cell studies.
  • Existing platforms face limitations in fabrication, biocompatibility, and trapping efficiency.

Purpose of the Study:

  • To introduce the next generation of nanophotonic Standing Wave Array Traps (nSWATs).
  • To present a streamlined fabrication process and compact, biocompatible design for enhanced on-chip trapping.
  • To improve the performance and reduce the cost of optical tweezers arrays.

Main Methods:

  • Utilized silicon nitride (Si3N4) waveguides for low-loss operation.
  • Employed a biofriendly 1064 nm laser with high input power capacity.
  • Integrated microcircuitry and photonics for all-optical, feedback-free particle manipulation.
Keywords:
array trapsnanophotonicsoptical trapprecise manipulationstanding wave

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  • Incorporated an anticorrosive layer for sustained operation in aqueous buffers.

    • Main Results:

    • Achieved high stiffness traps with subnanometer displacement resolution.
    • Demonstrated linear scaling of trap stiffness with input power, independent of trapping centers.
    • Successfully trapped and positioned numerous nanoparticles on waveguide surfaces.
    • Minimized laser-induced specimen heating and absorption.

    Conclusions:

    • The new nSWATs offer a high-performance, low-cost optical tweezers array laboratory on-chip.
    • These devices significantly advance capabilities for on-chip biological and nanoscale research.
    • The streamlined design and improved performance facilitate broader adoption of optical trapping techniques.