Degenerate Four-Wave Mixing Study of a

Methyl-Red Doped Nematic Liquid Crystal

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Table of Contents

OUTLINE OF PRESENTATION  

PHASES OF LIQUID CRYSTALS 

MOTIVATION 

NONLINEAR OPTICS - BASICS 

CHEMICAL SRUCTURES 

PREPARATION OF LC CELL 

CELL STRUCTURE 

ABSORPTION SPECTRA FOR DYE:LC CELL 

RELATIVE ABSORPTION OF DYE:LC AT 505 nm 

CIS-TRANS ISOMERISM 

REORIENTATION OF LC 

OPTICAL DIAGRAM 

DEGENERATE FOUR-WAVE MIXING 

SELF-DIFFRACITION BY DYE:POLYMER:LC 

FIRST-ORDER SELF-DIFFRACTION 

TYPICAL RESULTS 

CONCLUSIONS