Figure 3: Polarization contrast in excitation with varying crystal aspect ratio.
From: Directional charge separation in isolated organic semiconductor crystalline nanowires
(a) Polarization contrast (M=(Imax−Imin)/(Imax+Imin)) for TAT crystallites of varying aspect ratios fit with a linear regression (dashed line). (b) The intensity trajectory over ∼2π rotation of excitation polarization, referenced to the crystal long axis (dashed line). (c) Chromophore orientation relative to the crystallographic a axis (long axis) as determined from the phase of the intensity modulation. Scale bar , 300 nm.
