Fig. 1: The schematic of van der Waals isotope heterostructuring showcased in phonon polaritons in hBN isotopic heterostructures.
From: Van der Waals isotope heterostructures for engineering phonon polariton dispersions
a current materials are isotope-homogenous: isotopes always distribute evenly in space. b experiment schematic of s-SNOM imaging of engineered hyperbolic phonon polaritons in 10B−11B isotopic heterostructures.
