Nonlinear optical susceptibilities of AlN film

Abstract
The nonlinear optical coefficients of AlN have been determined as ‖d33‖= (23.2±35%) dQ11 and ‖d31‖ ≲0.04‖d33‖ for the c‐plate film and for a fundamental beam at 1.064 μm. The result is discussed with reference to the bond‐charge model.