Fig. 2: Experimentally measured optical response of the fabricated metasurface.
From: Reconfigurable image processing metasurfaces with phase-change materials
Scanning electron microscope images of the fabricated metasurface. Scale bars = 2 µm in (a) and 500 nm in (b). The false-colored image in (b) shows the silicon slab (green) and the underlying VO2 film (red). c Transmission spectrum of the device selected for further experiments, at near-room temperature (T = 34 °C, black curve), at T = 60 °C (cyan curve) and at T = 68 °C (red curve). Evolution of the normal-incidence transmission spectrum of the metasurface in (c), as the temperature is slowly increased (d) and decreased (e).
