Electrically driven three-dimensional solitary waves as director bullets in nematic liquid crystals

Area of Science:

• Soft Matter Physics
• Nonlinear Dynamics
• Liquid Crystal Science

Background:

• Electric field-induced molecular reorientation is crucial for displays and electroconvection.
• Existing reorientation phenomena are typically homogeneous or periodically modulated.
• The possibility of localized, three-dimensional solitary waves remained unexplored.

Purpose of the Study:

• To investigate the potential for creating spatially localized, three-dimensional solitary waves of molecular reorientation.
• To explore novel phenomena beyond homogeneous or periodic reorientation patterns.

Main Methods:

• Applying electric fields to nematic liquid crystals.
• Observing and analyzing the collective reorientation dynamics of molecules.
• Characterizing the properties of the generated solitary wave structures.

Main Results:

• Demonstrated the creation of particle-like propagating solitary waves of oscillating molecular director.
• These 'director bullets' exhibit self-trapped, confined shapes and high-speed propagation perpendicular to the electric field.
• The solitary waves are true solitons, preserving shape during collisions and displaying particle-wave duality.

Conclusions:

• Electric fields can generate novel, particle-like solitary waves in nematic molecules.
• These solitons possess unique properties like asymmetry, high speed, and collision resilience.
• The findings open avenues for studying material-dependent behaviors and potential applications.