Electric-field intensity distribution when a single healthy exosome (H) is placed at the immediate vicinity of (a) the uncoated and the PS-coated microresonators and (b) the CsPbI₃-coated microresonator, plotted together with the polarization magnitude |P| inside the exosome. The vertical colorbars denote |E|. Note that the color scale for the CsPbI₃-coated microresonator is different and the maximum value is twice as high as in the other cases. The horizontal colorbars indicate |P| inside the healthy exosome. Note the different magnitude ranges for each plot.