Design and analysis of optically pumped semiconductor VECSEL with ANECz optical control layer

Through the reversible isomerization of trans-cis-trans under the linear polarization light,the molecules of azo materials have the same tropism which is vertical to the polarization of light.This means that azo materials have photo-induced birefringence which is related to optical power and polarization angle of the light.Based on the photo-induced birefringence of azo materials,we design a new type of optically pumped semiconductor vertical external cavity surface emitting laser (OPS-VECSEL) which can control the polarization and frequency of the ejection laser.The functional molecules of azo materials are [3-azo- (4'nitro)]-(9-ethyl)-carbazole (ANECz).