Analysis of transverse Anderson localization in refractive index structures with customized random potential

Area of Science:

• Photonics
• Nonlinear Optics
• Condensed Matter Physics

Background:

• Anderson localization describes the wave function localization in a disordered medium.
• Controlling light propagation in random potentials is crucial for optical devices.

Purpose of the Study:

• To demonstrate Anderson localization in an optically induced random potential.
• To investigate the influence of potential characteristics on light localization.
• To enable flexible regulation of light localization strength.

Main Methods:

• Utilizing computer-controlled spatial light modulators to create randomized nondiffracting beams.
• Inducing a random potential in a photorefractive crystal with variable modulation length (photonic grain size) and depth (disorder strength).
• Quantitatively analyzing the localization length of light as a function of these parameters.

Main Results:

• Demonstrated Anderson localization in optically induced random potentials.
• Identified modulation length and disorder strength as crucial factors influencing light propagation and localization.
• Showcased variably strong light localization based on potential characteristics.

Conclusions:

• Transverse light localization in random refractive index landscapes is strongly dependent on the potential's character.
• The optical induction configuration allows for flexible regulation of light localization strength.