FIGURE 6.

Polarization dependence of quantum yield. (a) Distribution of chlorophyll transition dipole moments over the unit sphere. (b) Average of directional overlaps between the polarization of incident light and the transition dipole moments of chlorophylls represented on an expanded scale. Absorption probability of an incident photon is proportional to this directional overlap. (On a linear scale where white corresponds to zero overlap and black corresponds to perfect alignment, the averages shown in b become indistinguishable across the graph. Therefore, the scale is expanded in b as shown.) These results are consistent with a uniform random distribution of chlorophyll orientations over the unit sphere, suggesting the absence of a specific arrangement of the distribution of orientations of the chlorophyll aggregate beyond that of a random collection.