Resonant Stimulated Photorefractive Scattering

Area of Science:

• Optics
• Condensed Matter Physics
• Materials Science

Background:

• High-Q crystalline cavities are crucial for precise light-matter interactions.
• The photorefractive effect describes light-induced changes in refractive index.
• Understanding light scattering mechanisms is key to controlling optical properties.

Purpose of the Study:

• To report the first observations of stimulated photorefractive scattering in a high-Q crystalline cavity.
• To provide a comprehensive theoretical explanation for the observed phenomenon.
• To investigate the impact of this scattering on cavity mode structure.

Main Methods:

• Experimental setup utilizing a high-Q crystalline cavity.
• Observation of light field interactions and grating formation.
• Theoretical modeling of the photorefractive effect and light scattering dynamics.

Main Results:

• First observation of stimulated photorefractive scattering in this system.
• Formation of an ultranarrow, long-lived Bragg grating via the photorefractive effect.
• Self-reinforcing feedback loop between the standing wave and the grating.
• Splitting of cavity modes into a doublet, disrupting spectral periodicity.

Conclusions:

• Stimulated photorefractive scattering is a novel mechanism in high-Q crystalline cavities.
• The interplay between light and grating leads to significant mode structure changes.
• This finding opens new avenues for controlling light propagation and cavity resonance.