| Band structures of a polariton conveyor belt. a, A diagram of the sample excitation. The angle between the lasers controls the fringe periodicity, while the frequency offset controls their speed and movement. b, Example real-space tomography (intensity normalized) just below and just above the condensation threshold. The red-colored diagram on top corresponds to the intensity of the laser interference pattern. c, Example band structures (intensity normalized) at zero frequency offset for different lattice periods and depths. d, The average size of the first and second Brillouin Zones (BZs) as functions of ∆klaser. Credit: Nature Photonics (2024). |
