Back to Search
Start Over
Extracting the potential-well of a near-field optical trap using the Helmholtz-Hodge decomposition
- Source :
- Applied Physics Letters. 112:091103
- Publication Year :
- 2018
- Publisher :
- AIP Publishing, 2018.
-
Abstract
- The non-conservative nature of the force field generated by a near-field optical trap is analyzed. A plasmonic C-shaped engraving on a gold film is considered as the trap. The force field is calculated using the Maxwell stress tensor method. The Helmholtz-Hodge decomposition is used to extract the conservative and the non-conservative component of the force. Due to the non-negligible non-conservative component, it is found that the conventional approach of extracting the potential by direct integration of the force is not accurate. Despite the non-conservative nature of the force field, it is found that the statistical properties of a trapped nanoparticle can be estimated from the conservative component of the force field alone. Experimental and numerical results are presented to support the claims.
- Subjects :
- Physics
Physics and Astronomy (miscellaneous)
Force field (physics)
Near and far field
02 engineering and technology
Maxwell stress tensor
021001 nanoscience & nanotechnology
01 natural sciences
Computational physics
Trap (computing)
symbols.namesake
Radiation pressure
Helmholtz free energy
0103 physical sciences
symbols
Direct integration of a beam
010306 general physics
0210 nano-technology
Plasmon
Subjects
Details
- ISSN :
- 10773118 and 00036951
- Volume :
- 112
- Database :
- OpenAIRE
- Journal :
- Applied Physics Letters
- Accession number :
- edsair.doi...........2715e60c3cc0b4ce354faf75e191ddf0
- Full Text :
- https://doi.org/10.1063/1.5016810