Coherent control of light scattering from nanostructured materials by second-harmonic generation

Area of Science:

• Photonics and Nanotechnology
• Nonlinear Optics

Background:

• Controlling light scattering from nanostructures is crucial for applications in optical sensing and imaging.
• Existing methods often lack precise control over both intensity and directionality simultaneously.

Purpose of the Study:

• To introduce a novel active, all-optical method for controlling light scattering from single nanostructures.
• To demonstrate the principle of coherent control using linear scattering and second-harmonic generation.

Main Methods:

• Utilizing the coherent interplay between linear light scattering and second-harmonic generation.
• Employing phase delay and relative angle of excitation beams for control.
• Performing numerical model calculations to validate the technique.

Main Results:

• Demonstrated active control over the intensity and directionality of scattered light.
• Showcased the feasibility of all-optical manipulation of light-nanostructure interactions.
• Numerical calculations confirmed the proposed coherent control mechanism.

Conclusions:

• The proposed all-optical method offers precise control over light scattering from nanostructures.
• This technique opens new avenues for advanced optical manipulation and nanophotonics applications.
• Coherent control provides a powerful tool for tailoring light-matter interactions at the nanoscale.