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Nonlinear Conversion of Orbital Angular Momentum States of Light (2105.12183v1)
Published 25 May 2021 in physics.optics
Abstract: We investigate the second harmonic generation of light field carrying orbital angular momentum in bulk $\chi{(2)}$ material. We show that due to conservation of energy and momentum, the frequency doubled beam light has a modified spatial distribution and mode characteristics. Through rigorous phase matching conditions, we demonstrate efficient mode and frequency conversion based on three wave nonlinear optical mixing.