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Moire Phonon Polaritons in Twisted Two-Dimensional Materials

How a moire superlattice potential reshapes phonon polaritons in atomically thin polar crystals into a distinct class of confined light-matter modes. Students learn how the superlattice reconstructs the polariton spectrum into flat branches and nano-patterns the electromagnetic wavefunctions, enabling sub-wavelength optical confinement and a spatially varying near-field response that can be probed experimentally.