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Related Concept Videos

Solenoids01:17

Solenoids

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field for a solenoid is the vector sum of the magnetic field due to its individual turns. For an ideal solenoid, the magnetic field inside is almost uniform and parallel to the solenoid axis, while the magnetic field outside the solenoid is nearly zero.
Each turn in a solenoid can be approximated as a circular current carrying coil that generates a dipole moment. The...
Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

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Deflection of a Beam01:19

Deflection of a Beam

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Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

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Related Experiment Video

Updated: Jun 13, 2026

Design and Building of a Customizable, Single-Objective, Light-Sheet Fluorescence Microscope for the Visualization of Cytoskeleton Networks
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Design and Building of a Customizable, Single-Objective, Light-Sheet Fluorescence Microscope for the Visualization of Cytoskeleton Networks

Published on: January 26, 2024

Optical solenoid beams.

Sang-Hyuk Lee1, Yohai Roichman, David G Grier

  • 1Department of Molecular and Cell Biology, Institute for Quantitative Biology, University of California - Berkeley Berkeley, CA 94720-3220, USA.

Optics Express
|April 15, 2010
PubMed
Summary
This summary is machine-generated.

We developed optical solenoid beams, a novel light beam that can push particles against its propagation direction. This breakthrough in optical physics offers new ways to manipulate microscopic objects using light.

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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Design and Building of a Customizable, Single-Objective, Light-Sheet Fluorescence Microscope for the Visualization of Cytoskeleton Networks
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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Area of Science:

  • Optics and Photonics
  • Light-Matter Interactions

Background:

  • Collimated beams of light are essential for optical manipulation.
  • Existing light beams have limitations in controlling forces on objects.

Purpose of the Study:

  • To introduce and characterize optical solenoid beams.
  • To demonstrate the unique force-exerting properties of these beams.

Main Methods:

  • Solving the Helmholtz equation for optical solenoid beams.
  • Holographic projection of optical solenoid beams.
  • Video microscopy to observe particle movement.

Main Results:

  • Optical solenoid beams are diffractionless and feature a spiraling intensity peak.
  • These beams possess independent helical pitch on their wavefronts.
  • Demonstrated backward force exertion on a colloidal sphere, moving it upstream.

Conclusions:

  • Optical solenoid beams offer unprecedented control over light-induced forces.
  • This capability opens new avenues for micro-manipulation and propulsion systems.