Structuring polarization states of light in space and time

Area of Science:

• Optics and Photonics
• Quantum Optics
• Complex Light Fields

Background:

• Spatiotemporal light beam sculpting is crucial for optical technologies.
• Existing spatiotemporal beams include space-time wave packets and optical vortices.

Purpose of the Study:

• Introduce and demonstrate a novel class of spatiotemporal polarization states.
• Propose a generalized spatiotemporal higher-order Poincaré sphere.
• Enable simultaneous control of spatial and temporal light properties.

Main Methods:

• Superposition of two orthogonal circular polarization states, each with a spatiotemporal optical vortex.
• Theoretical modeling and experimental validation using ultrafast femtosecond pulses.
• Construction of spatiotemporal skyrmionic textures.

Main Results:

• Demonstrated a new class of spatiotemporal polarization states.
• Showed polarization distributions evolve in both space and time.
• Generated localized, topologically nontrivial spatiotemporal skyrmionic textures.

Conclusions:

• The proposed framework allows versatile generation and control of multidimensional structured polarization fields.
• These findings open opportunities for advanced imaging, micromanipulation, and optical communications.
• Potential implications for classical and quantum information processing.