Customizing subwavelength stochastic light fields via structured spatial coherence in a high-NA resonator.

Area of Science:

• Optics and Photonics
• Nanotechnology

Background:

• High-numerical aperture (high-NA) systems are vital for superresolution imaging and nanofabrication.
• Wave interference in high-NA systems necessitates high light coherence for precise intensity and spin control.

Purpose of the Study:

• To investigate the generation of nanoscale 3D light features using structured coherence states with low-coherence light in high-NA resonator systems.
• To explore the survival and characteristics of these features in incoherent optical fields.

Main Methods:

• Utilizing structured coherence states of light within a high-NA resonator system.
• Analyzing the generated 3D light intensity and spin textures at the nanoscale.

Main Results:

• Successfully generated nanometer-scale 3D light features, including helical intensity and transverse spin textures, from low-coherence light.
• Observed that these structured features persist in highly incoherent optical fields.
• Found an counterintuitive enhancement of the longitudinal electric field component and transverse spin density despite decreased spatial coherence.

Conclusions:

• Structured coherence states offer a novel pathway to create intricate 3D light structures at the nanoscale, even with low-coherence light.
• The generated twisted spectral density and spin structures have potential applications in advanced imaging and metrology.