Holographic studies of photoinduced anisotropy in molecular glassy films containing diphenylamine azochromophores

Photoinduced Anisotropy of IWK-2D Azobenzene Molecular Glassy Films

“…It can be seen from the Tables 1-3 that recording efficiency was maximal for p-p recording polarizations in transmission mode and for L-R recording polarizations in reflection mode. Also, recording efficiency did not correlate with PA. We have also made the same conclusion previously for other materials [7].…”

“…This paper is devoted to holographic studies of PA in triphenyl group containing molecular glassy films of azobenzene with additionally incorporated 5,5-dimethylcyclohex-2-enylidene structural fragments and dicyanomethylene electron acceptor moieties (denoted as IWK-2D) using p-p, L-L and L-R recording beam polarizations. The obtained results are quite different compared to the previous ones [7]. Experimental setups for PA measurements in transmission and reflection mode in the case of L-L recording polarizations are shown in Fig.…”

“…Therefore, PA studies are of interest. Previously we have holographically studied PA in molecular glassy films containing diphenylamine azochromophores [7] using only p-p recording to induce PA. This paper is devoted to holographic studies of PA in triphenyl group containing molecular glassy films of azobenzene with additionally incorporated 5,5-dimethylcyclohex-2-enylidene structural fragments and dicyanomethylene electron acceptor moieties (denoted as IWK-2D) using p-p, L-L and L-R recording beam polarizations.…”

Photoinduced mass transport in low molecular organic glasses and its practical application in holography

“…Despite of the large amount of the studied materials -organic [11][12][13][14][15][16][17][18], inorganic [19][20][21], composites [22][23][24] and polymers of different chemical compositions [25][26][27][28][29], the direct relief formation phenomenon used in practice is limited. One of the most critical issues is the amount of energy required for the formation of the SRG.…”

“…Secondly, there are different types of polymers in which the diazo group is chemically incorporated into the polymer chain [27,32], or attached as side groups [25,26,29,33,34]. And thirdly, there are low molecular weight organic glasses (LMOG) capable of forming an optically uniform film of thickness up to several microns [11][12][13][14][43][44][45].…”