Related Experiment Video
Updated: Jan 4, 2026
09:13
Plasmonic Trapping and Release of Nanoparticles in a Monitoring Environment
Published on: April 4, 2017
7.9K
Plasmonic optical trapping of nanoparticles with precise angular selectivity
Optics Express
|November 6, 2019
Summary
This study demonstrates a novel plasmonic trapping method using a gold-capped nanoparticle and metal tip tweezers. The gold cap enables precise optical trapping and adjustable angles, crucial for single molecule manipulation.
Area of Science:
- Nanotechnology
- Optics
- Materials Science
Background:
- Optical tweezers are vital for manipulating microscopic objects.
- Asymmetric particles present challenges for precise optical trapping.
- Plasmonic interactions offer enhanced control in optical trapping systems.
Purpose of the Study:
- To propose and investigate a plasmonic trapping scheme for asymmetric nanoparticles.
- To numerically analyze the optical trapping behavior of a gold-capped polystyrene nanoparticle using metal tip tweezers.
- To explore the tunability of nanoparticle trapping angles via incident wavelength.
Main Methods:
- Numerical investigation of optical trapping.
- Utilizing a polystyrene nanoparticle with a gold cap.
- Employing metal tip tweezers for particle manipulation.
Main Results:
- The metal tip successfully captured the nanoparticle at the gold cap due to strong plasmonic interaction.
- Trapping at other particle positions was not achieved.
- The trapping angle was tunable by altering the incident wavelength.
Conclusions:
- The proposed plasmonic trapping scheme allows for precise control over nanoparticle capture at the gold cap.
- Tunable trapping angles have significant potential for advanced applications like single molecule manipulation.
- This method offers a new approach for high-precision optical manipulation.
