Castagna R1, Milner A, Zyss J, Prior Y.
Adv Mater. 2013 Apr 18;25(15):2234-8. doi: 10.1002/adma.201204394. Epub 2013 Feb 20.Spots of second harmonic generation (SHG) are produced from nanopatterned sub-micrometer areas of nonlinear polymer media. Information is written by using a biased-AFM tip, a highly nonlinear polymer (poly(methyl metha-acrylate)-co-Disperse Red 1), and a novel "floating-tip nanolithography" (FTN) technique. Dipoles are oriented and aligned at the nanoscale under the biased-AFM tip, resulting in SHG production. The information is storable over weeks.Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.