Table 1.

Isotropic refractive index, birefringence and thickness for different supported lipid bilayers (SLBs) with standard error of the mean (SEM) given in parenthesis. Thickness in this case refers to the thickness obtained by averaging over the thicknesses obtained by calculating the thickness for a fixed refractive index of the lipids corresponding to 1.47.

	POPC SLB	POPC SLB (Ca2+)	POPC:POPS SLB (Ca2+)	DOPC SLB	DOPC SLB (Ca2+)	DOPC:DOPS SLB (Ca2+)
n	1.4788 (2.8e–3)	1.4782 (1.2e–3)	1.4711 (1.4e–3)	1.456 (2.5e–3)	1.4693 (4.2e–3)	1.4904 (3.6e–3)
Birefringence	0.02164 (5.3e–4)	0.01960 (3.5e–4)	0.01955 (7.1e–4)	0.01586 (7.4e–4)	0.0139 (2.1e–3)	0.0250 (1.9e–3)
Thickness (nm)	4.976 (9.9e –2)	4.962 (4.3e –2)	4.689 (5.5e –2)	3.992 (8.4e –2)	4.46 (1.4e –1)	5.2855 (5.1e –3)