Figure 12.

D_∞h symmetry of a gold nanodisk leads to D_4h symmetry of the active medium and a 2-color system by 2-step P2PP using linear polarization. (a) SEM image of HPN resulting from P2PP using X-polarized light: the gold nanodisk surrounded by two polymer lobes containing green QDs. (b) SEM image of the same HPN resulting from subsequent P2PP using Y-polarized light with another photopolymer formulation: the Au nanodisk surrounded by two pairs of polymer lobes along X and Y, containing green and red QDs, respectively. In (a), (b) the top left inserts are FDTD calculation of the intensity of the near-field, used for P2PP, of the nanodisks at λ = 780 nm. (c) illustration of the resulting hybrid nanosystem. (d, e) Far-field photoluminescence image from the hybrid structure shined at 405 nm wavelength by a laser beamlinearly polarized along Y and X, respectively. (a–e) Adapted with permission from ref (88). Copyright 2015 American Chemical Society.