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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
Published on: September 5, 2017
Plasmonic optical trap having very large active volume realized with nano-ring structure.
Zhiwen Kang1, Haixi Zhang, Haifei Lu
1Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong SAR, China.
Optics Letters
|May 26, 2012
Summary
Gold nano-rings show promise as plasmonic nano-optical tweezers, effectively trapping nanoparticles in a large active volume. This design is ideal for manipulating low-concentration nano-objects in lab-on-a-chip systems.
Area of Science:
- Plasmonics
- Nanophotonics
- Optical Tweezers
Background:
- Plasmonic nanostructures offer unique light-matter interaction properties.
- Optical tweezers are crucial for manipulating nanoscale objects.
Purpose of the Study:
- To investigate the feasibility of gold nano-rings as plasmonic nano-optical tweezers.
- To evaluate the trapping potential and active volume of gold nano-rings.
Main Methods:
- Numerical simulations or experimental characterization of gold nano-rings.
- Analysis of trapping potential at resonant wavelengths (λ=785 nm).
Main Results:
- Gold nano-rings generate a maximum trapping potential of approximately 32k(B)T for gold nanoparticles.
- Multiple potential wells create a large active trapping volume of ~10^6 nm³.
- Effective manipulation of nano-objects in low concentrations into high-field regions.
Conclusions:
- Gold nano-rings are a feasible and effective design for plasmonic nano-optical tweezers.
- The large active volume and trapping efficiency are suitable for manipulating sparse nanoparticle samples.
- Integration with microfluidics for lab-on-a-chip applications is well-suited.
