Full text loading...
(a) Absorption (Abs.) spectral mapping image, (b) AFM image, and (c) PL image of a single rubrene nanoplate. The thickness of the rubrene nanoplate was measured to be ∼400 nm with AFM. The assignment of crystal axes, a, b, and c, of the rubrene nanoplate is indicated by arrows. (d)Absorption spectra (red, black) and the PL spectra (blue, green) averaged from the center area of the same rubrene nanoplate. Black and blue curves are with the input illumination polarized along the crystal's a-axis, and the red and the green curves are with polarization along the b-axis. Inset shows a PL spectrum obtained with a 0.25 NA objective lens, where the 605 nm peak is dominant over the 560 nm peak.
(a) Absorption spectra using condenser OLs with different NAs. An increase of the 530 nm band with increasing NA is clearly visible. The absorption spectra are normalized with respect to the band at 479 nm. (b) Plot of the band height ratio (IM /ILN ) at 530 nm and 479 nm vs. the average incidence illumination angle.
(a) Spectral mapping images of the absorption strength and (b) the spatial distribution of IM /IL N of OMBD-grown rubrene film. The close spatial correlation between the absorption strength and IM /ILN should be noted. (c) The averaged absorption spectra (black: domain I, red: domain II) and the PL spectra (blue: domain I, green: domain II) averaged from each domain.
(a) The absorption spectra obtained at varying polarization directions on an OMBD rubrene thin film. (b) Plot of total integrated strength of absorption vs. illumination polarization angle. (c) Plot of the ratio (IM /ILN ) at 530 nm and 479 nm vs. illumination polarization angle.
Article metrics loading...