Fig. 3: Polarization control in real and k spaces.
From: Broadband near-infrared hyperbolic polaritons in MoOCl2
a–c Optical images of MoOCl2 samples with single flake and twisted bilayers. Thickness, twist angle, and PEEM measured area (red circle) are indicated. The arrows in (a–c) indicate the a-axis of MoOCl2 flakes, and the flake with the orange arrow is below the flake with the purple arrow. d–i Corresponding PEEM and FFT images with the four polarizations at a representative wavelength of 1000 nm (φ = 0° corresponds to x-polarization).
