Polymer-based second harmonic generation materials are disclosed, including electric field poled, chromophore-functionalized polyphenylene ethers with second harmonic coefficients (d.sub.33) as high as 65.times.10.sup.-9 esu, Tg.apprxeq.173.degree. C., and with superior temporal stability of the poling-induced...http://www.google.es/patents/US5156918?utm_source=gb-gplus-sharePatente US5156918 - Self-assembled super lattices
