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Nonlinear Conversion of Orbital Angular Momentum States of Light
preprint
posted on 2023-01-11, 22:52 authored by Pascal Bassène, Finn Buldt, Nazifa Rumman, Tianhong Wang, Phillip Heitert, Moussa N'GomWe 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.
