Related Experiment Video
Updated: Jul 28, 2026
13:39
Optical Trapping of Nanoparticles
Published on: January 15, 2013
22.5K
Optical multi-trapping by Kinoform m-Bonacci lenses
Optics Express
|October 15, 2022
Summary
Researchers developed a novel optical trapping method using a special lens to precisely control multiple particles in 3D. This breakthrough enables advanced microscale and nanoscale applications by overcoming previous limitations in axial manipulation.
Area of Science:
- Optics and Photonics
- Micro/Nanotechnology
- Biophysics
Background:
- Optical manipulation is crucial for micro/nanoscale applications, including molecular biology and quantum computation.
- Existing optical tweezers struggle with stable, simultaneous 3D manipulation of multiple particles, especially along the axial direction, due to focal plane limitations and optical forces.
Purpose of the Study:
- To introduce a new optical trapping strategy overcoming limitations in 3D particle manipulation.
- To enable dynamic control of multiple particles along the axial direction for advanced applications.
Main Methods:
- Development of an aperiodic kinoform diffractive lens based on the m-Bonacci sequence.
- Utilizing the lens to create split first-order diffractive foci with separation dependent on the generalized m-golden ratio.
- Integration into a laser tweezers system for simultaneous trapping and axial positioning.
Main Results:
- Demonstrated extended manipulation capabilities with concomitant trapping of particles in different focal planes.
- Achieved computer-controlled axial positioning of particles, enabling precise interparticle distance management.
- Successfully generated dynamic three-dimensional all-optical lattices.
Conclusions:
- The proposed m-Bonacci sequence-based kinoform diffractive lens offers a versatile solution for multi-particle 3D optical manipulation.
- This technology significantly enhances laser tweezers capabilities, particularly for axial control.
- The developed all-optical lattices are valuable for diverse microscale and nanoscale technological applications.
Related Concept Videos
01:16Confocal Fluorescence Microscopy
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...