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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: J Neurochem. 2012 Jun 27;122(4):661–671. doi: 10.1111/j.1471-4159.2012.07816.x

Figure 2. Polarized excitation of an idealized membrane deformation.

Figure 2

A. DiI intercalates in the plasma membrane with its transition dipole moments (red arrowheads) nearly parallel with the membrane head groups. B. In a p-polarized evanescent field, diI that is non-parallel with the coverslip (red arrows) is preferentially excited. If this were an s-polarized evanescent field, diI parallel to the coverslip (blue arrows) would be preferentially excited.