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Related Experiment Video

Updated: Jun 20, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Optical trapping of small particles using a 1.3-microm compact InGaAsP diode laser.

S Sato1, M Ohyumi, H Shibata

  • 1Research Institute of Electrical Communication, Tohoku University, Sendai 980, Japan.

Optics Letters
|September 24, 2009
PubMed
Summary
This summary is machine-generated.

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Researchers demonstrate noncontact optical trapping of small particles using a near-infrared diode laser. This method proves reliable for various particles and shows a linear relationship between laser power and trapping force.

Area of Science:

  • Optics
  • Biophysics
  • Laser Physics

Background:

  • Optical trapping utilizes laser beams to manipulate microscopic particles.
  • Near-infrared lasers offer advantages for biological applications due to reduced scattering and absorption.
  • Diode lasers provide a compact and potentially cost-effective alternative to traditional trapping lasers.

Purpose of the Study:

  • To investigate the feasibility and reliability of noncontact optical trapping using a single-beam gradient force from a near-infrared diode laser.
  • To quantitatively measure the trapping force exerted by the diode laser.
  • To compare the trapping performance of the diode laser with that of an Argon (Ar) laser.

Main Methods:

  • Employed a single-beam gradient force optical trap.

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
07:20

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

Related Experiment Videos

Last Updated: Jun 20, 2026

Optical Trapping of Nanoparticles
13:39

Optical Trapping of Nanoparticles

Published on: January 15, 2013

Trapping of Micro Particles in Nanoplasmonic Optical Lattice
07:20

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

Published on: September 5, 2017

  • Utilized a near-infrared InGaAsP diode laser operating at 1.33 micrometers.
  • Tested trapping with polystyrene latex spheres, glass spheres, and yeast cells.
  • Measured the horizontal trapping force by moving particles vertically to the beam axis and applying Stokes law.

    • Main Results:

    • Successfully demonstrated noncontact optical trapping of polystyrene latex spheres, glass spheres, and yeast cells.
    • Confirmed the feasibility and reliability of diode-laser optical trapping.
    • Established a linear relationship between the trapping laser power and the measured horizontal trapping force.
    • Provided a quantitative comparison of trapping force with that of an Ar laser.

    Conclusions:

    • Near-infrared diode lasers are suitable for noncontact optical trapping of small particles.
    • The trapping force is linearly dependent on the laser power, consistent with theoretical models.
    • Diode-laser-based optical trapping offers a viable alternative for various applications, including biophysics.