Discrete light propagation and self-trapping in liquid crystals

Area of Science:

• Nonlinear optics
• Liquid crystal photonics
• Waveguide arrays

Background:

• Understanding light propagation in engineered optical materials is crucial for developing advanced photonic devices.
• Liquid crystals offer unique electro-optic properties for dynamic control of light.
• Waveguide arrays are fundamental structures for studying discrete light phenomena.

Purpose of the Study:

• To investigate light propagation and self-localization dynamics in voltage-controlled nematic liquid crystal waveguide arrays.
• To demonstrate and characterize nonlinear optical phenomena such as discrete solitons and all-optical steering.
• To explore the formation of complex light structures like multiband vector breathers.

Main Methods:

• Fabrication of voltage-controlled channel waveguide arrays in undoped nematic liquid crystals.
• Experimental observation of light propagation, discrete diffraction, and soliton formation.
• Utilizing coupled mode theory and full numerical simulations for result validation.

Main Results:

• Observation of discrete diffraction and stable optical solitons in the liquid crystal waveguide array.
• Demonstration of all-optical angular steering of light beams.
• Evidence for the formation of multiband vector breathers, a complex nonlinear phenomenon.

Conclusions:

• Nematic liquid crystals provide a versatile platform for controlling light propagation and nonlinear effects in waveguide arrays.
• Experimental findings are in excellent agreement with theoretical predictions from coupled mode theory and numerical simulations.
• The study highlights the potential for liquid crystal photonics in applications requiring dynamic light manipulation.