STILBAZOLIUM SALT

摘要

The invention relates to a Stilbazolium salt with both high second-order nonlinear optical properties and very favorable crystal growth characteristics, which is especially suited for nonlinear optical applications such as frequency conversion, electro-optic modulation, optical parametric oscillation, and Terahertz (THz) generation and detection. The salt is represented by formula (I): wherein at least one of R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB>, being identical or different, independently represents alkyl group, wherein hydroxyl group, carboxylic group, amino group may be included, preferably as ending group, and the remaining groups R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB> represent hydrogen atom or deuterium atom; X<SUB>1</SUB> represents hydrogen atom, deuterium atom, halogen atom, alkyl, hydroxyl group, aldehyde group, amino group, nitro group, amide group or carboxylic group; X<SUB>2</SUB> and X<SUB>3</SUB>, being identical or different, independently represent hydrogen atom, deuterium atom, alkyl group, aryl group, wherein hydroxyl group, amide group, carboxylic group, ether bond, double bond, or the like may be included in each group; and n = 1 or 2.