Deterministic subwavelength control of light confinement in nanostructures

Area of Science:

• Plasmonics and Nanophotonics
• Optical Engineering
• Computational Electromagnetics

Background:

• Controlling light at the nanoscale is crucial for advanced optical technologies.
• Plasmonic nanostructures offer unique light manipulation capabilities.
• Precisely tailoring near-field light patterns remains a significant challenge.

Purpose of the Study:

• To introduce a novel deterministic protocol for controlling light concentration in plasmonic nanostructures.
• To provide a physically grounded method for generating desired near-field optical patterns.
• To demonstrate precise control over light fields in complex nanostructured systems.

Main Methods:

• Development of a deterministic protocol based on continuous light flows.
• Exact inversion of the nanosystem's response tensor.
• Calculation of incident fields to achieve target near-field patterns.

Main Results:

• The deterministic optical inversion protocol enables precise control over light concentration.
• Achieved near-field patterns are expressed as coherent superpositions of high-order beams.
• Demonstrated high accuracy and efficiency in controlling light in complex plasmonic architectures.

Conclusions:

• The proposed protocol offers a robust solution for deterministic light field control in plasmonics.
• This method allows for the generation of complex and tailored optical near-fields.
• The findings pave the way for enhanced applications in nanophotonics and optical sensing.