Figure 4

Photocurrent as a function of the heading angle. The diamonds and dots correspond to the data recorded with the x and y coil producing the \(B_{1}\) field, respectively. In the picture the difference Δ of \(\sigma _{-}\) minus \(\sigma _{+}\) values are added to visualize the balancing. The solid lines are calculated according to Eq. (8). The dotted gray lines correspond to the functions \(0.38~\mathrm{mA} \times \vert \cos \alpha \vert \) and \(0.38~\mathrm{mA} \times \cos ^{2} \alpha \) for a better visual comparison of the results to these functions