Microdroplet Actuation via Light Line Optoelectrowetting (LL-OEW)

Figure 2

Cross-sectional sketch of OEW setup with equivalent electrical circuit. The OEW light is already illustrated for the LL-OEW case with the light line with (in our case) elliptical cross section entering the chip from one side (here from the front facet). It has to be kept in mind that the equivalent circuit has different values for the capacitances and impedances at sites with or without light incidence. Thus, the equivalent circuit has to be understood as locally valid. The modulation frequency has an influence on the impedances.