Algebra of optical dislocations with plasmonic nanostructures.

Area of Science:

• Optics and Photonics
• Materials Science
• Condensed Matter Physics

Background:

• Plasmonic structures support unique optical phenomena.
• Dislocations in physical systems can lead to topological defects.
• Berry-type dislocations are a quantum mechanical concept with optical analogues.

Purpose of the Study:

• To investigate the generation of optical vortices from plasmonic structures with dislocations.
• To explore the combined effect of physical and Berry-type dislocations on vortex beam properties.
• To demonstrate controlled manipulation of topological charge in plasmonic vortex beams.

Main Methods:

• Fabrication of plasmonic nanostructures with engineered physical and Berry-type dislocations.
• Characterization of optical vortex generation using microscopy and spectroscopy.
• Theoretical modeling to understand the role of dislocations in phase singularity formation.

Main Results:

• Plasmonic structures with dislocations generate optical vortices with phase singularity.
• Combining physical and Berry-type dislocations enables intricate control over topological charge.
• Selective excitation allows for convenient modification of plasmonic field distributions.

Conclusions:

• The interplay of physical and Berry-type dislocations offers a novel pathway for tailoring plasmonic vortex beams.
• This approach provides a versatile tool for manipulating light at the nanoscale.
• Potential applications in optical trapping, microscopy, and information processing.