Fig. 4: Bandgap dependence of helical dichroism.
From: Intrinsic dichroism in amorphous and crystalline solids with helical light
a HD(Type I) in different materials as a function of displacement of singularity in the OAM beam for l = ± 1 in crystalline and amorphous solids. b Average magnitude of HD (Type I) as a function of bandgap for l = ± 1. The error bars in (a) represent the standard error, of multiple measurements (n = 3), calculated for an average energy range used to obtain HD. The error bars in (b) represent the average of three δ positions in (a) where the HD (Type I) signal is maximum. All curves are obtained under identical experimental conditions.
