Twist-Engineered Nonlinearity in Two-Dimensional Crystals for Tailored Quantum Light

Dylan Mcleod, Fabrizio Chiriano, Francesco Graffitti +3

Van der Waals (vdW) materials enable nonlinear-optical engineering with unprecedented resolution: their strong second-order susceptibilities ($\ddot{I}{‡}^{(2)}$) and twist-tunable interlay…